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1 /* simulator.c -- Interface for the AArch64 simulator.
2
3 Copyright (C) 2015-2018 Free Software Foundation, Inc.
4
5 Contributed by Red Hat.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21
22 #include "config.h"
23 #include <stdlib.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <sys/types.h>
27 #include <math.h>
28 #include <time.h>
29 #include <limits.h>
30
31 #include "simulator.h"
32 #include "cpustate.h"
33 #include "memory.h"
34
35 #define NO_SP 0
36 #define SP_OK 1
37
38 #define TST(_flag) (aarch64_test_CPSR_bit (cpu, _flag))
39 #define IS_SET(_X) (TST (( _X )) ? 1 : 0)
40 #define IS_CLEAR(_X) (TST (( _X )) ? 0 : 1)
41
42 /* Space saver macro. */
43 #define INSTR(HIGH, LOW) uimm (aarch64_get_instr (cpu), (HIGH), (LOW))
44
45 #define HALT_UNALLOC \
46 do \
47 { \
48 TRACE_DISASM (cpu, aarch64_get_PC (cpu)); \
49 TRACE_INSN (cpu, \
50 "Unallocated instruction detected at sim line %d," \
51 " exe addr %" PRIx64, \
52 __LINE__, aarch64_get_PC (cpu)); \
53 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),\
54 sim_stopped, SIM_SIGILL); \
55 } \
56 while (0)
57
58 #define HALT_NYI \
59 do \
60 { \
61 TRACE_DISASM (cpu, aarch64_get_PC (cpu)); \
62 TRACE_INSN (cpu, \
63 "Unimplemented instruction detected at sim line %d," \
64 " exe addr %" PRIx64, \
65 __LINE__, aarch64_get_PC (cpu)); \
66 if (! TRACE_ANY_P (cpu)) \
67 sim_io_eprintf (CPU_STATE (cpu), "SIM Error: Unimplemented instruction: %#08x\n", \
68 aarch64_get_instr (cpu)); \
69 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),\
70 sim_stopped, SIM_SIGABRT); \
71 } \
72 while (0)
73
74 #define NYI_assert(HI, LO, EXPECTED) \
75 do \
76 { \
77 if (INSTR ((HI), (LO)) != (EXPECTED)) \
78 HALT_NYI; \
79 } \
80 while (0)
81
82 /* Helper functions used by expandLogicalImmediate. */
83
84 /* for i = 1, ... N result<i-1> = 1 other bits are zero */
85 static inline uint64_t
86 ones (int N)
87 {
88 return (N == 64 ? (uint64_t)-1UL : ((1UL << N) - 1));
89 }
90
91 /* result<0> to val<N> */
92 static inline uint64_t
93 pickbit (uint64_t val, int N)
94 {
95 return pickbits64 (val, N, N);
96 }
97
98 static uint64_t
99 expand_logical_immediate (uint32_t S, uint32_t R, uint32_t N)
100 {
101 uint64_t mask;
102 uint64_t imm;
103 unsigned simd_size;
104
105 /* The immediate value is S+1 bits to 1, left rotated by SIMDsize - R
106 (in other words, right rotated by R), then replicated. */
107 if (N != 0)
108 {
109 simd_size = 64;
110 mask = 0xffffffffffffffffull;
111 }
112 else
113 {
114 switch (S)
115 {
116 case 0x00 ... 0x1f: /* 0xxxxx */ simd_size = 32; break;
117 case 0x20 ... 0x2f: /* 10xxxx */ simd_size = 16; S &= 0xf; break;
118 case 0x30 ... 0x37: /* 110xxx */ simd_size = 8; S &= 0x7; break;
119 case 0x38 ... 0x3b: /* 1110xx */ simd_size = 4; S &= 0x3; break;
120 case 0x3c ... 0x3d: /* 11110x */ simd_size = 2; S &= 0x1; break;
121 default: return 0;
122 }
123 mask = (1ull << simd_size) - 1;
124 /* Top bits are IGNORED. */
125 R &= simd_size - 1;
126 }
127
128 /* NOTE: if S = simd_size - 1 we get 0xf..f which is rejected. */
129 if (S == simd_size - 1)
130 return 0;
131
132 /* S+1 consecutive bits to 1. */
133 /* NOTE: S can't be 63 due to detection above. */
134 imm = (1ull << (S + 1)) - 1;
135
136 /* Rotate to the left by simd_size - R. */
137 if (R != 0)
138 imm = ((imm << (simd_size - R)) & mask) | (imm >> R);
139
140 /* Replicate the value according to SIMD size. */
141 switch (simd_size)
142 {
143 case 2: imm = (imm << 2) | imm;
144 case 4: imm = (imm << 4) | imm;
145 case 8: imm = (imm << 8) | imm;
146 case 16: imm = (imm << 16) | imm;
147 case 32: imm = (imm << 32) | imm;
148 case 64: break;
149 default: return 0;
150 }
151
152 return imm;
153 }
154
155 /* Instr[22,10] encodes N immr and imms. we want a lookup table
156 for each possible combination i.e. 13 bits worth of int entries. */
157 #define LI_TABLE_SIZE (1 << 13)
158 static uint64_t LITable[LI_TABLE_SIZE];
159
160 void
161 aarch64_init_LIT_table (void)
162 {
163 unsigned index;
164
165 for (index = 0; index < LI_TABLE_SIZE; index++)
166 {
167 uint32_t N = uimm (index, 12, 12);
168 uint32_t immr = uimm (index, 11, 6);
169 uint32_t imms = uimm (index, 5, 0);
170
171 LITable [index] = expand_logical_immediate (imms, immr, N);
172 }
173 }
174
175 static void
176 dexNotify (sim_cpu *cpu)
177 {
178 /* instr[14,0] == type : 0 ==> method entry, 1 ==> method reentry
179 2 ==> exit Java, 3 ==> start next bytecode. */
180 uint32_t type = INSTR (14, 0);
181
182 TRACE_EVENTS (cpu, "Notify Insn encountered, type = 0x%x", type);
183
184 switch (type)
185 {
186 case 0:
187 /* aarch64_notifyMethodEntry (aarch64_get_reg_u64 (cpu, R23, 0),
188 aarch64_get_reg_u64 (cpu, R22, 0)); */
189 break;
190 case 1:
191 /* aarch64_notifyMethodReentry (aarch64_get_reg_u64 (cpu, R23, 0),
192 aarch64_get_reg_u64 (cpu, R22, 0)); */
193 break;
194 case 2:
195 /* aarch64_notifyMethodExit (); */
196 break;
197 case 3:
198 /* aarch64_notifyBCStart (aarch64_get_reg_u64 (cpu, R23, 0),
199 aarch64_get_reg_u64 (cpu, R22, 0)); */
200 break;
201 }
202 }
203
204 /* secondary decode within top level groups */
205
206 static void
207 dexPseudo (sim_cpu *cpu)
208 {
209 /* assert instr[28,27] = 00
210
211 We provide 2 pseudo instructions:
212
213 HALT stops execution of the simulator causing an immediate
214 return to the x86 code which entered it.
215
216 CALLOUT initiates recursive entry into x86 code. A register
217 argument holds the address of the x86 routine. Immediate
218 values in the instruction identify the number of general
219 purpose and floating point register arguments to be passed
220 and the type of any value to be returned. */
221
222 uint32_t PSEUDO_HALT = 0xE0000000U;
223 uint32_t PSEUDO_CALLOUT = 0x00018000U;
224 uint32_t PSEUDO_CALLOUTR = 0x00018001U;
225 uint32_t PSEUDO_NOTIFY = 0x00014000U;
226 uint32_t dispatch;
227
228 if (aarch64_get_instr (cpu) == PSEUDO_HALT)
229 {
230 TRACE_EVENTS (cpu, " Pseudo Halt Instruction");
231 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
232 sim_stopped, SIM_SIGTRAP);
233 }
234
235 dispatch = INSTR (31, 15);
236
237 /* We do not handle callouts at the moment. */
238 if (dispatch == PSEUDO_CALLOUT || dispatch == PSEUDO_CALLOUTR)
239 {
240 TRACE_EVENTS (cpu, " Callout");
241 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
242 sim_stopped, SIM_SIGABRT);
243 }
244
245 else if (dispatch == PSEUDO_NOTIFY)
246 dexNotify (cpu);
247
248 else
249 HALT_UNALLOC;
250 }
251
252 /* Load-store single register (unscaled offset)
253 These instructions employ a base register plus an unscaled signed
254 9 bit offset.
255
256 N.B. the base register (source) can be Xn or SP. all other
257 registers may not be SP. */
258
259 /* 32 bit load 32 bit unscaled signed 9 bit. */
260 static void
261 ldur32 (sim_cpu *cpu, int32_t offset)
262 {
263 unsigned rn = INSTR (9, 5);
264 unsigned rt = INSTR (4, 0);
265
266 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
267 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u32
268 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
269 + offset));
270 }
271
272 /* 64 bit load 64 bit unscaled signed 9 bit. */
273 static void
274 ldur64 (sim_cpu *cpu, int32_t offset)
275 {
276 unsigned rn = INSTR (9, 5);
277 unsigned rt = INSTR (4, 0);
278
279 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
280 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u64
281 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
282 + offset));
283 }
284
285 /* 32 bit load zero-extended byte unscaled signed 9 bit. */
286 static void
287 ldurb32 (sim_cpu *cpu, int32_t offset)
288 {
289 unsigned rn = INSTR (9, 5);
290 unsigned rt = INSTR (4, 0);
291
292 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
293 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u8
294 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
295 + offset));
296 }
297
298 /* 32 bit load sign-extended byte unscaled signed 9 bit. */
299 static void
300 ldursb32 (sim_cpu *cpu, int32_t offset)
301 {
302 unsigned rn = INSTR (9, 5);
303 unsigned rt = INSTR (4, 0);
304
305 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
306 aarch64_set_reg_u64 (cpu, rt, NO_SP, (uint32_t) aarch64_get_mem_s8
307 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
308 + offset));
309 }
310
311 /* 64 bit load sign-extended byte unscaled signed 9 bit. */
312 static void
313 ldursb64 (sim_cpu *cpu, int32_t offset)
314 {
315 unsigned rn = INSTR (9, 5);
316 unsigned rt = INSTR (4, 0);
317
318 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
319 aarch64_set_reg_s64 (cpu, rt, NO_SP, aarch64_get_mem_s8
320 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
321 + offset));
322 }
323
324 /* 32 bit load zero-extended short unscaled signed 9 bit */
325 static void
326 ldurh32 (sim_cpu *cpu, int32_t offset)
327 {
328 unsigned rn = INSTR (9, 5);
329 unsigned rd = INSTR (4, 0);
330
331 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
332 aarch64_set_reg_u64 (cpu, rd, NO_SP, aarch64_get_mem_u16
333 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
334 + offset));
335 }
336
337 /* 32 bit load sign-extended short unscaled signed 9 bit */
338 static void
339 ldursh32 (sim_cpu *cpu, int32_t offset)
340 {
341 unsigned rn = INSTR (9, 5);
342 unsigned rd = INSTR (4, 0);
343
344 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
345 aarch64_set_reg_u64 (cpu, rd, NO_SP, (uint32_t) aarch64_get_mem_s16
346 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
347 + offset));
348 }
349
350 /* 64 bit load sign-extended short unscaled signed 9 bit */
351 static void
352 ldursh64 (sim_cpu *cpu, int32_t offset)
353 {
354 unsigned rn = INSTR (9, 5);
355 unsigned rt = INSTR (4, 0);
356
357 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
358 aarch64_set_reg_s64 (cpu, rt, NO_SP, aarch64_get_mem_s16
359 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
360 + offset));
361 }
362
363 /* 64 bit load sign-extended word unscaled signed 9 bit */
364 static void
365 ldursw (sim_cpu *cpu, int32_t offset)
366 {
367 unsigned rn = INSTR (9, 5);
368 unsigned rd = INSTR (4, 0);
369
370 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
371 aarch64_set_reg_u64 (cpu, rd, NO_SP, (uint32_t) aarch64_get_mem_s32
372 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
373 + offset));
374 }
375
376 /* N.B. with stores the value in source is written to the address
377 identified by source2 modified by offset. */
378
379 /* 32 bit store 32 bit unscaled signed 9 bit. */
380 static void
381 stur32 (sim_cpu *cpu, int32_t offset)
382 {
383 unsigned rn = INSTR (9, 5);
384 unsigned rd = INSTR (4, 0);
385
386 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
387 aarch64_set_mem_u32 (cpu,
388 aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset,
389 aarch64_get_reg_u32 (cpu, rd, NO_SP));
390 }
391
392 /* 64 bit store 64 bit unscaled signed 9 bit */
393 static void
394 stur64 (sim_cpu *cpu, int32_t offset)
395 {
396 unsigned rn = INSTR (9, 5);
397 unsigned rd = INSTR (4, 0);
398
399 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
400 aarch64_set_mem_u64 (cpu,
401 aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset,
402 aarch64_get_reg_u64 (cpu, rd, NO_SP));
403 }
404
405 /* 32 bit store byte unscaled signed 9 bit */
406 static void
407 sturb (sim_cpu *cpu, int32_t offset)
408 {
409 unsigned rn = INSTR (9, 5);
410 unsigned rd = INSTR (4, 0);
411
412 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
413 aarch64_set_mem_u8 (cpu,
414 aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset,
415 aarch64_get_reg_u8 (cpu, rd, NO_SP));
416 }
417
418 /* 32 bit store short unscaled signed 9 bit */
419 static void
420 sturh (sim_cpu *cpu, int32_t offset)
421 {
422 unsigned rn = INSTR (9, 5);
423 unsigned rd = INSTR (4, 0);
424
425 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
426 aarch64_set_mem_u16 (cpu,
427 aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset,
428 aarch64_get_reg_u16 (cpu, rd, NO_SP));
429 }
430
431 /* Load single register pc-relative label
432 Offset is a signed 19 bit immediate count in words
433 rt may not be SP. */
434
435 /* 32 bit pc-relative load */
436 static void
437 ldr32_pcrel (sim_cpu *cpu, int32_t offset)
438 {
439 unsigned rd = INSTR (4, 0);
440
441 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
442 aarch64_set_reg_u64 (cpu, rd, NO_SP,
443 aarch64_get_mem_u32
444 (cpu, aarch64_get_PC (cpu) + offset * 4));
445 }
446
447 /* 64 bit pc-relative load */
448 static void
449 ldr_pcrel (sim_cpu *cpu, int32_t offset)
450 {
451 unsigned rd = INSTR (4, 0);
452
453 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
454 aarch64_set_reg_u64 (cpu, rd, NO_SP,
455 aarch64_get_mem_u64
456 (cpu, aarch64_get_PC (cpu) + offset * 4));
457 }
458
459 /* sign extended 32 bit pc-relative load */
460 static void
461 ldrsw_pcrel (sim_cpu *cpu, int32_t offset)
462 {
463 unsigned rd = INSTR (4, 0);
464
465 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
466 aarch64_set_reg_u64 (cpu, rd, NO_SP,
467 aarch64_get_mem_s32
468 (cpu, aarch64_get_PC (cpu) + offset * 4));
469 }
470
471 /* float pc-relative load */
472 static void
473 fldrs_pcrel (sim_cpu *cpu, int32_t offset)
474 {
475 unsigned int rd = INSTR (4, 0);
476
477 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
478 aarch64_set_vec_u32 (cpu, rd, 0,
479 aarch64_get_mem_u32
480 (cpu, aarch64_get_PC (cpu) + offset * 4));
481 }
482
483 /* double pc-relative load */
484 static void
485 fldrd_pcrel (sim_cpu *cpu, int32_t offset)
486 {
487 unsigned int st = INSTR (4, 0);
488
489 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
490 aarch64_set_vec_u64 (cpu, st, 0,
491 aarch64_get_mem_u64
492 (cpu, aarch64_get_PC (cpu) + offset * 4));
493 }
494
495 /* long double pc-relative load. */
496 static void
497 fldrq_pcrel (sim_cpu *cpu, int32_t offset)
498 {
499 unsigned int st = INSTR (4, 0);
500 uint64_t addr = aarch64_get_PC (cpu) + offset * 4;
501 FRegister a;
502
503 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
504 aarch64_get_mem_long_double (cpu, addr, & a);
505 aarch64_set_FP_long_double (cpu, st, a);
506 }
507
508 /* This can be used to scale an offset by applying
509 the requisite shift. the second argument is either
510 16, 32 or 64. */
511
512 #define SCALE(_offset, _elementSize) \
513 ((_offset) << ScaleShift ## _elementSize)
514
515 /* This can be used to optionally scale a register derived offset
516 by applying the requisite shift as indicated by the Scaling
517 argument. The second argument is either Byte, Short, Word
518 or Long. The third argument is either Scaled or Unscaled.
519 N.B. when _Scaling is Scaled the shift gets ANDed with
520 all 1s while when it is Unscaled it gets ANDed with 0. */
521
522 #define OPT_SCALE(_offset, _elementType, _Scaling) \
523 ((_offset) << (_Scaling ? ScaleShift ## _elementType : 0))
524
525 /* This can be used to zero or sign extend a 32 bit register derived
526 value to a 64 bit value. the first argument must be the value as
527 a uint32_t and the second must be either UXTW or SXTW. The result
528 is returned as an int64_t. */
529
530 static inline int64_t
531 extend (uint32_t value, Extension extension)
532 {
533 union
534 {
535 uint32_t u;
536 int32_t n;
537 } x;
538
539 /* A branchless variant of this ought to be possible. */
540 if (extension == UXTW || extension == NoExtension)
541 return value;
542
543 x.u = value;
544 return x.n;
545 }
546
547 /* Scalar Floating Point
548
549 FP load/store single register (4 addressing modes)
550
551 N.B. the base register (source) can be the stack pointer.
552 The secondary source register (source2) can only be an Xn register. */
553
554 /* Load 32 bit unscaled signed 9 bit with pre- or post-writeback. */
555 static void
556 fldrs_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
557 {
558 unsigned rn = INSTR (9, 5);
559 unsigned st = INSTR (4, 0);
560 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
561
562 if (wb != Post)
563 address += offset;
564
565 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
566 aarch64_set_vec_u32 (cpu, st, 0, aarch64_get_mem_u32 (cpu, address));
567 if (wb == Post)
568 address += offset;
569
570 if (wb != NoWriteBack)
571 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
572 }
573
574 /* Load 8 bit with unsigned 12 bit offset. */
575 static void
576 fldrb_abs (sim_cpu *cpu, uint32_t offset)
577 {
578 unsigned rd = INSTR (4, 0);
579 unsigned rn = INSTR (9, 5);
580 uint64_t addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset;
581
582 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
583 aarch64_set_vec_u8 (cpu, rd, 0, aarch64_get_mem_u32 (cpu, addr));
584 }
585
586 /* Load 16 bit scaled unsigned 12 bit. */
587 static void
588 fldrh_abs (sim_cpu *cpu, uint32_t offset)
589 {
590 unsigned rd = INSTR (4, 0);
591 unsigned rn = INSTR (9, 5);
592 uint64_t addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 16);
593
594 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
595 aarch64_set_vec_u16 (cpu, rd, 0, aarch64_get_mem_u16 (cpu, addr));
596 }
597
598 /* Load 32 bit scaled unsigned 12 bit. */
599 static void
600 fldrs_abs (sim_cpu *cpu, uint32_t offset)
601 {
602 unsigned rd = INSTR (4, 0);
603 unsigned rn = INSTR (9, 5);
604 uint64_t addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 32);
605
606 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
607 aarch64_set_vec_u32 (cpu, rd, 0, aarch64_get_mem_u32 (cpu, addr));
608 }
609
610 /* Load 64 bit scaled unsigned 12 bit. */
611 static void
612 fldrd_abs (sim_cpu *cpu, uint32_t offset)
613 {
614 unsigned rd = INSTR (4, 0);
615 unsigned rn = INSTR (9, 5);
616 uint64_t addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 64);
617
618 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
619 aarch64_set_vec_u64 (cpu, rd, 0, aarch64_get_mem_u64 (cpu, addr));
620 }
621
622 /* Load 128 bit scaled unsigned 12 bit. */
623 static void
624 fldrq_abs (sim_cpu *cpu, uint32_t offset)
625 {
626 unsigned rd = INSTR (4, 0);
627 unsigned rn = INSTR (9, 5);
628 uint64_t addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 128);
629
630 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
631 aarch64_set_vec_u64 (cpu, rd, 0, aarch64_get_mem_u64 (cpu, addr));
632 aarch64_set_vec_u64 (cpu, rd, 1, aarch64_get_mem_u64 (cpu, addr + 8));
633 }
634
635 /* Load 32 bit scaled or unscaled zero- or sign-extended
636 32-bit register offset. */
637 static void
638 fldrs_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
639 {
640 unsigned rm = INSTR (20, 16);
641 unsigned rn = INSTR (9, 5);
642 unsigned st = INSTR (4, 0);
643 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
644 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
645 uint64_t displacement = OPT_SCALE (extended, 32, scaling);
646
647 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
648 aarch64_set_vec_u32 (cpu, st, 0, aarch64_get_mem_u32
649 (cpu, address + displacement));
650 }
651
652 /* Load 64 bit unscaled signed 9 bit with pre- or post-writeback. */
653 static void
654 fldrd_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
655 {
656 unsigned rn = INSTR (9, 5);
657 unsigned st = INSTR (4, 0);
658 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
659
660 if (wb != Post)
661 address += offset;
662
663 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
664 aarch64_set_vec_u64 (cpu, st, 0, aarch64_get_mem_u64 (cpu, address));
665
666 if (wb == Post)
667 address += offset;
668
669 if (wb != NoWriteBack)
670 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
671 }
672
673 /* Load 64 bit scaled or unscaled zero- or sign-extended 32-bit register offset. */
674 static void
675 fldrd_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
676 {
677 unsigned rm = INSTR (20, 16);
678 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
679 uint64_t displacement = OPT_SCALE (extended, 64, scaling);
680
681 fldrd_wb (cpu, displacement, NoWriteBack);
682 }
683
684 /* Load 128 bit unscaled signed 9 bit with pre- or post-writeback. */
685 static void
686 fldrq_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
687 {
688 FRegister a;
689 unsigned rn = INSTR (9, 5);
690 unsigned st = INSTR (4, 0);
691 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
692
693 if (wb != Post)
694 address += offset;
695
696 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
697 aarch64_get_mem_long_double (cpu, address, & a);
698 aarch64_set_FP_long_double (cpu, st, a);
699
700 if (wb == Post)
701 address += offset;
702
703 if (wb != NoWriteBack)
704 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
705 }
706
707 /* Load 128 bit scaled or unscaled zero- or sign-extended 32-bit register offset */
708 static void
709 fldrq_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
710 {
711 unsigned rm = INSTR (20, 16);
712 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
713 uint64_t displacement = OPT_SCALE (extended, 128, scaling);
714
715 fldrq_wb (cpu, displacement, NoWriteBack);
716 }
717
718 /* Memory Access
719
720 load-store single register
721 There are four addressing modes available here which all employ a
722 64 bit source (base) register.
723
724 N.B. the base register (source) can be the stack pointer.
725 The secondary source register (source2)can only be an Xn register.
726
727 Scaled, 12-bit, unsigned immediate offset, without pre- and
728 post-index options.
729 Unscaled, 9-bit, signed immediate offset with pre- or post-index
730 writeback.
731 scaled or unscaled 64-bit register offset.
732 scaled or unscaled 32-bit extended register offset.
733
734 All offsets are assumed to be raw from the decode i.e. the
735 simulator is expected to adjust scaled offsets based on the
736 accessed data size with register or extended register offset
737 versions the same applies except that in the latter case the
738 operation may also require a sign extend.
739
740 A separate method is provided for each possible addressing mode. */
741
742 /* 32 bit load 32 bit scaled unsigned 12 bit */
743 static void
744 ldr32_abs (sim_cpu *cpu, uint32_t offset)
745 {
746 unsigned rn = INSTR (9, 5);
747 unsigned rt = INSTR (4, 0);
748
749 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
750 /* The target register may not be SP but the source may be. */
751 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u32
752 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
753 + SCALE (offset, 32)));
754 }
755
756 /* 32 bit load 32 bit unscaled signed 9 bit with pre- or post-writeback. */
757 static void
758 ldr32_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
759 {
760 unsigned rn = INSTR (9, 5);
761 unsigned rt = INSTR (4, 0);
762 uint64_t address;
763
764 if (rn == rt && wb != NoWriteBack)
765 HALT_UNALLOC;
766
767 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
768
769 if (wb != Post)
770 address += offset;
771
772 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
773 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u32 (cpu, address));
774
775 if (wb == Post)
776 address += offset;
777
778 if (wb != NoWriteBack)
779 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
780 }
781
782 /* 32 bit load 32 bit scaled or unscaled
783 zero- or sign-extended 32-bit register offset */
784 static void
785 ldr32_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
786 {
787 unsigned rm = INSTR (20, 16);
788 unsigned rn = INSTR (9, 5);
789 unsigned rt = INSTR (4, 0);
790 /* rn may reference SP, rm and rt must reference ZR */
791
792 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
793 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
794 uint64_t displacement = OPT_SCALE (extended, 32, scaling);
795
796 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
797 aarch64_set_reg_u64 (cpu, rt, NO_SP,
798 aarch64_get_mem_u32 (cpu, address + displacement));
799 }
800
801 /* 64 bit load 64 bit scaled unsigned 12 bit */
802 static void
803 ldr_abs (sim_cpu *cpu, uint32_t offset)
804 {
805 unsigned rn = INSTR (9, 5);
806 unsigned rt = INSTR (4, 0);
807
808 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
809 /* The target register may not be SP but the source may be. */
810 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u64
811 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
812 + SCALE (offset, 64)));
813 }
814
815 /* 64 bit load 64 bit unscaled signed 9 bit with pre- or post-writeback. */
816 static void
817 ldr_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
818 {
819 unsigned rn = INSTR (9, 5);
820 unsigned rt = INSTR (4, 0);
821 uint64_t address;
822
823 if (rn == rt && wb != NoWriteBack)
824 HALT_UNALLOC;
825
826 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
827
828 if (wb != Post)
829 address += offset;
830
831 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
832 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u64 (cpu, address));
833
834 if (wb == Post)
835 address += offset;
836
837 if (wb != NoWriteBack)
838 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
839 }
840
841 /* 64 bit load 64 bit scaled or unscaled zero-
842 or sign-extended 32-bit register offset. */
843 static void
844 ldr_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
845 {
846 unsigned rm = INSTR (20, 16);
847 unsigned rn = INSTR (9, 5);
848 unsigned rt = INSTR (4, 0);
849 /* rn may reference SP, rm and rt must reference ZR */
850
851 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
852 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
853 uint64_t displacement = OPT_SCALE (extended, 64, scaling);
854
855 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
856 aarch64_set_reg_u64 (cpu, rt, NO_SP,
857 aarch64_get_mem_u64 (cpu, address + displacement));
858 }
859
860 /* 32 bit load zero-extended byte scaled unsigned 12 bit. */
861 static void
862 ldrb32_abs (sim_cpu *cpu, uint32_t offset)
863 {
864 unsigned rn = INSTR (9, 5);
865 unsigned rt = INSTR (4, 0);
866
867 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
868 /* The target register may not be SP but the source may be
869 there is no scaling required for a byte load. */
870 aarch64_set_reg_u64 (cpu, rt, NO_SP,
871 aarch64_get_mem_u8
872 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset));
873 }
874
875 /* 32 bit load zero-extended byte unscaled signed 9 bit with pre- or post-writeback. */
876 static void
877 ldrb32_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
878 {
879 unsigned rn = INSTR (9, 5);
880 unsigned rt = INSTR (4, 0);
881 uint64_t address;
882
883 if (rn == rt && wb != NoWriteBack)
884 HALT_UNALLOC;
885
886 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
887
888 if (wb != Post)
889 address += offset;
890
891 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
892 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u8 (cpu, address));
893
894 if (wb == Post)
895 address += offset;
896
897 if (wb != NoWriteBack)
898 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
899 }
900
901 /* 32 bit load zero-extended byte scaled or unscaled zero-
902 or sign-extended 32-bit register offset. */
903 static void
904 ldrb32_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
905 {
906 unsigned rm = INSTR (20, 16);
907 unsigned rn = INSTR (9, 5);
908 unsigned rt = INSTR (4, 0);
909 /* rn may reference SP, rm and rt must reference ZR */
910
911 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
912 int64_t displacement = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
913 extension);
914
915 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
916 /* There is no scaling required for a byte load. */
917 aarch64_set_reg_u64 (cpu, rt, NO_SP,
918 aarch64_get_mem_u8 (cpu, address + displacement));
919 }
920
921 /* 64 bit load sign-extended byte unscaled signed 9 bit
922 with pre- or post-writeback. */
923 static void
924 ldrsb_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
925 {
926 unsigned rn = INSTR (9, 5);
927 unsigned rt = INSTR (4, 0);
928 uint64_t address;
929 int64_t val;
930
931 if (rn == rt && wb != NoWriteBack)
932 HALT_UNALLOC;
933
934 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
935
936 if (wb != Post)
937 address += offset;
938
939 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
940 val = aarch64_get_mem_s8 (cpu, address);
941 aarch64_set_reg_s64 (cpu, rt, NO_SP, val);
942
943 if (wb == Post)
944 address += offset;
945
946 if (wb != NoWriteBack)
947 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
948 }
949
950 /* 64 bit load sign-extended byte scaled unsigned 12 bit. */
951 static void
952 ldrsb_abs (sim_cpu *cpu, uint32_t offset)
953 {
954 ldrsb_wb (cpu, offset, NoWriteBack);
955 }
956
957 /* 64 bit load sign-extended byte scaled or unscaled zero-
958 or sign-extended 32-bit register offset. */
959 static void
960 ldrsb_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
961 {
962 unsigned rm = INSTR (20, 16);
963 unsigned rn = INSTR (9, 5);
964 unsigned rt = INSTR (4, 0);
965 /* rn may reference SP, rm and rt must reference ZR */
966
967 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
968 int64_t displacement = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
969 extension);
970 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
971 /* There is no scaling required for a byte load. */
972 aarch64_set_reg_s64 (cpu, rt, NO_SP,
973 aarch64_get_mem_s8 (cpu, address + displacement));
974 }
975
976 /* 32 bit load zero-extended short scaled unsigned 12 bit. */
977 static void
978 ldrh32_abs (sim_cpu *cpu, uint32_t offset)
979 {
980 unsigned rn = INSTR (9, 5);
981 unsigned rt = INSTR (4, 0);
982 uint32_t val;
983
984 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
985 /* The target register may not be SP but the source may be. */
986 val = aarch64_get_mem_u16 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
987 + SCALE (offset, 16));
988 aarch64_set_reg_u32 (cpu, rt, NO_SP, val);
989 }
990
991 /* 32 bit load zero-extended short unscaled signed 9 bit
992 with pre- or post-writeback. */
993 static void
994 ldrh32_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
995 {
996 unsigned rn = INSTR (9, 5);
997 unsigned rt = INSTR (4, 0);
998 uint64_t address;
999
1000 if (rn == rt && wb != NoWriteBack)
1001 HALT_UNALLOC;
1002
1003 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1004
1005 if (wb != Post)
1006 address += offset;
1007
1008 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1009 aarch64_set_reg_u32 (cpu, rt, NO_SP, aarch64_get_mem_u16 (cpu, address));
1010
1011 if (wb == Post)
1012 address += offset;
1013
1014 if (wb != NoWriteBack)
1015 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1016 }
1017
1018 /* 32 bit load zero-extended short scaled or unscaled zero-
1019 or sign-extended 32-bit register offset. */
1020 static void
1021 ldrh32_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1022 {
1023 unsigned rm = INSTR (20, 16);
1024 unsigned rn = INSTR (9, 5);
1025 unsigned rt = INSTR (4, 0);
1026 /* rn may reference SP, rm and rt must reference ZR */
1027
1028 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1029 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
1030 uint64_t displacement = OPT_SCALE (extended, 16, scaling);
1031
1032 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1033 aarch64_set_reg_u32 (cpu, rt, NO_SP,
1034 aarch64_get_mem_u16 (cpu, address + displacement));
1035 }
1036
1037 /* 32 bit load sign-extended short scaled unsigned 12 bit. */
1038 static void
1039 ldrsh32_abs (sim_cpu *cpu, uint32_t offset)
1040 {
1041 unsigned rn = INSTR (9, 5);
1042 unsigned rt = INSTR (4, 0);
1043 int32_t val;
1044
1045 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1046 /* The target register may not be SP but the source may be. */
1047 val = aarch64_get_mem_s16 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
1048 + SCALE (offset, 16));
1049 aarch64_set_reg_s32 (cpu, rt, NO_SP, val);
1050 }
1051
1052 /* 32 bit load sign-extended short unscaled signed 9 bit
1053 with pre- or post-writeback. */
1054 static void
1055 ldrsh32_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1056 {
1057 unsigned rn = INSTR (9, 5);
1058 unsigned rt = INSTR (4, 0);
1059 uint64_t address;
1060
1061 if (rn == rt && wb != NoWriteBack)
1062 HALT_UNALLOC;
1063
1064 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1065
1066 if (wb != Post)
1067 address += offset;
1068
1069 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1070 aarch64_set_reg_s32 (cpu, rt, NO_SP,
1071 (int32_t) aarch64_get_mem_s16 (cpu, address));
1072
1073 if (wb == Post)
1074 address += offset;
1075
1076 if (wb != NoWriteBack)
1077 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1078 }
1079
1080 /* 32 bit load sign-extended short scaled or unscaled zero-
1081 or sign-extended 32-bit register offset. */
1082 static void
1083 ldrsh32_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1084 {
1085 unsigned rm = INSTR (20, 16);
1086 unsigned rn = INSTR (9, 5);
1087 unsigned rt = INSTR (4, 0);
1088 /* rn may reference SP, rm and rt must reference ZR */
1089
1090 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1091 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
1092 uint64_t displacement = OPT_SCALE (extended, 16, scaling);
1093
1094 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1095 aarch64_set_reg_s32 (cpu, rt, NO_SP,
1096 (int32_t) aarch64_get_mem_s16
1097 (cpu, address + displacement));
1098 }
1099
1100 /* 64 bit load sign-extended short scaled unsigned 12 bit. */
1101 static void
1102 ldrsh_abs (sim_cpu *cpu, uint32_t offset)
1103 {
1104 unsigned rn = INSTR (9, 5);
1105 unsigned rt = INSTR (4, 0);
1106 int64_t val;
1107
1108 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1109 /* The target register may not be SP but the source may be. */
1110 val = aarch64_get_mem_s16 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
1111 + SCALE (offset, 16));
1112 aarch64_set_reg_s64 (cpu, rt, NO_SP, val);
1113 }
1114
1115 /* 64 bit load sign-extended short unscaled signed 9 bit
1116 with pre- or post-writeback. */
1117 static void
1118 ldrsh64_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1119 {
1120 unsigned rn = INSTR (9, 5);
1121 unsigned rt = INSTR (4, 0);
1122 uint64_t address;
1123 int64_t val;
1124
1125 if (rn == rt && wb != NoWriteBack)
1126 HALT_UNALLOC;
1127
1128 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1129 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1130
1131 if (wb != Post)
1132 address += offset;
1133
1134 val = aarch64_get_mem_s16 (cpu, address);
1135 aarch64_set_reg_s64 (cpu, rt, NO_SP, val);
1136
1137 if (wb == Post)
1138 address += offset;
1139
1140 if (wb != NoWriteBack)
1141 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1142 }
1143
1144 /* 64 bit load sign-extended short scaled or unscaled zero-
1145 or sign-extended 32-bit register offset. */
1146 static void
1147 ldrsh_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1148 {
1149 unsigned rm = INSTR (20, 16);
1150 unsigned rn = INSTR (9, 5);
1151 unsigned rt = INSTR (4, 0);
1152
1153 /* rn may reference SP, rm and rt must reference ZR */
1154
1155 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1156 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
1157 uint64_t displacement = OPT_SCALE (extended, 16, scaling);
1158 int64_t val;
1159
1160 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1161 val = aarch64_get_mem_s16 (cpu, address + displacement);
1162 aarch64_set_reg_s64 (cpu, rt, NO_SP, val);
1163 }
1164
1165 /* 64 bit load sign-extended 32 bit scaled unsigned 12 bit. */
1166 static void
1167 ldrsw_abs (sim_cpu *cpu, uint32_t offset)
1168 {
1169 unsigned rn = INSTR (9, 5);
1170 unsigned rt = INSTR (4, 0);
1171 int64_t val;
1172
1173 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1174 val = aarch64_get_mem_s32 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
1175 + SCALE (offset, 32));
1176 /* The target register may not be SP but the source may be. */
1177 return aarch64_set_reg_s64 (cpu, rt, NO_SP, val);
1178 }
1179
1180 /* 64 bit load sign-extended 32 bit unscaled signed 9 bit
1181 with pre- or post-writeback. */
1182 static void
1183 ldrsw_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1184 {
1185 unsigned rn = INSTR (9, 5);
1186 unsigned rt = INSTR (4, 0);
1187 uint64_t address;
1188
1189 if (rn == rt && wb != NoWriteBack)
1190 HALT_UNALLOC;
1191
1192 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1193
1194 if (wb != Post)
1195 address += offset;
1196
1197 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1198 aarch64_set_reg_s64 (cpu, rt, NO_SP, aarch64_get_mem_s32 (cpu, address));
1199
1200 if (wb == Post)
1201 address += offset;
1202
1203 if (wb != NoWriteBack)
1204 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1205 }
1206
1207 /* 64 bit load sign-extended 32 bit scaled or unscaled zero-
1208 or sign-extended 32-bit register offset. */
1209 static void
1210 ldrsw_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1211 {
1212 unsigned rm = INSTR (20, 16);
1213 unsigned rn = INSTR (9, 5);
1214 unsigned rt = INSTR (4, 0);
1215 /* rn may reference SP, rm and rt must reference ZR */
1216
1217 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1218 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
1219 uint64_t displacement = OPT_SCALE (extended, 32, scaling);
1220
1221 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1222 aarch64_set_reg_s64 (cpu, rt, NO_SP,
1223 aarch64_get_mem_s32 (cpu, address + displacement));
1224 }
1225
1226 /* N.B. with stores the value in source is written to the
1227 address identified by source2 modified by source3/offset. */
1228
1229 /* 32 bit store scaled unsigned 12 bit. */
1230 static void
1231 str32_abs (sim_cpu *cpu, uint32_t offset)
1232 {
1233 unsigned rn = INSTR (9, 5);
1234 unsigned rt = INSTR (4, 0);
1235
1236 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1237 /* The target register may not be SP but the source may be. */
1238 aarch64_set_mem_u32 (cpu, (aarch64_get_reg_u64 (cpu, rn, SP_OK)
1239 + SCALE (offset, 32)),
1240 aarch64_get_reg_u32 (cpu, rt, NO_SP));
1241 }
1242
1243 /* 32 bit store unscaled signed 9 bit with pre- or post-writeback. */
1244 static void
1245 str32_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1246 {
1247 unsigned rn = INSTR (9, 5);
1248 unsigned rt = INSTR (4, 0);
1249 uint64_t address;
1250
1251 if (rn == rt && wb != NoWriteBack)
1252 HALT_UNALLOC;
1253
1254 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1255 if (wb != Post)
1256 address += offset;
1257
1258 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1259 aarch64_set_mem_u32 (cpu, address, aarch64_get_reg_u32 (cpu, rt, NO_SP));
1260
1261 if (wb == Post)
1262 address += offset;
1263
1264 if (wb != NoWriteBack)
1265 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1266 }
1267
1268 /* 32 bit store scaled or unscaled zero- or
1269 sign-extended 32-bit register offset. */
1270 static void
1271 str32_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1272 {
1273 unsigned rm = INSTR (20, 16);
1274 unsigned rn = INSTR (9, 5);
1275 unsigned rt = INSTR (4, 0);
1276
1277 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1278 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
1279 uint64_t displacement = OPT_SCALE (extended, 32, scaling);
1280
1281 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1282 aarch64_set_mem_u32 (cpu, address + displacement,
1283 aarch64_get_reg_u64 (cpu, rt, NO_SP));
1284 }
1285
1286 /* 64 bit store scaled unsigned 12 bit. */
1287 static void
1288 str_abs (sim_cpu *cpu, uint32_t offset)
1289 {
1290 unsigned rn = INSTR (9, 5);
1291 unsigned rt = INSTR (4, 0);
1292
1293 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1294 aarch64_set_mem_u64 (cpu,
1295 aarch64_get_reg_u64 (cpu, rn, SP_OK)
1296 + SCALE (offset, 64),
1297 aarch64_get_reg_u64 (cpu, rt, NO_SP));
1298 }
1299
1300 /* 64 bit store unscaled signed 9 bit with pre- or post-writeback. */
1301 static void
1302 str_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1303 {
1304 unsigned rn = INSTR (9, 5);
1305 unsigned rt = INSTR (4, 0);
1306 uint64_t address;
1307
1308 if (rn == rt && wb != NoWriteBack)
1309 HALT_UNALLOC;
1310
1311 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1312
1313 if (wb != Post)
1314 address += offset;
1315
1316 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1317 aarch64_set_mem_u64 (cpu, address, aarch64_get_reg_u64 (cpu, rt, NO_SP));
1318
1319 if (wb == Post)
1320 address += offset;
1321
1322 if (wb != NoWriteBack)
1323 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1324 }
1325
1326 /* 64 bit store scaled or unscaled zero-
1327 or sign-extended 32-bit register offset. */
1328 static void
1329 str_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1330 {
1331 unsigned rm = INSTR (20, 16);
1332 unsigned rn = INSTR (9, 5);
1333 unsigned rt = INSTR (4, 0);
1334 /* rn may reference SP, rm and rt must reference ZR */
1335
1336 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1337 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
1338 extension);
1339 uint64_t displacement = OPT_SCALE (extended, 64, scaling);
1340
1341 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1342 aarch64_set_mem_u64 (cpu, address + displacement,
1343 aarch64_get_reg_u64 (cpu, rt, NO_SP));
1344 }
1345
1346 /* 32 bit store byte scaled unsigned 12 bit. */
1347 static void
1348 strb_abs (sim_cpu *cpu, uint32_t offset)
1349 {
1350 unsigned rn = INSTR (9, 5);
1351 unsigned rt = INSTR (4, 0);
1352
1353 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1354 /* The target register may not be SP but the source may be.
1355 There is no scaling required for a byte load. */
1356 aarch64_set_mem_u8 (cpu,
1357 aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset,
1358 aarch64_get_reg_u8 (cpu, rt, NO_SP));
1359 }
1360
1361 /* 32 bit store byte unscaled signed 9 bit with pre- or post-writeback. */
1362 static void
1363 strb_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1364 {
1365 unsigned rn = INSTR (9, 5);
1366 unsigned rt = INSTR (4, 0);
1367 uint64_t address;
1368
1369 if (rn == rt && wb != NoWriteBack)
1370 HALT_UNALLOC;
1371
1372 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1373
1374 if (wb != Post)
1375 address += offset;
1376
1377 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1378 aarch64_set_mem_u8 (cpu, address, aarch64_get_reg_u8 (cpu, rt, NO_SP));
1379
1380 if (wb == Post)
1381 address += offset;
1382
1383 if (wb != NoWriteBack)
1384 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1385 }
1386
1387 /* 32 bit store byte scaled or unscaled zero-
1388 or sign-extended 32-bit register offset. */
1389 static void
1390 strb_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1391 {
1392 unsigned rm = INSTR (20, 16);
1393 unsigned rn = INSTR (9, 5);
1394 unsigned rt = INSTR (4, 0);
1395 /* rn may reference SP, rm and rt must reference ZR */
1396
1397 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1398 int64_t displacement = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
1399 extension);
1400
1401 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1402 /* There is no scaling required for a byte load. */
1403 aarch64_set_mem_u8 (cpu, address + displacement,
1404 aarch64_get_reg_u8 (cpu, rt, NO_SP));
1405 }
1406
1407 /* 32 bit store short scaled unsigned 12 bit. */
1408 static void
1409 strh_abs (sim_cpu *cpu, uint32_t offset)
1410 {
1411 unsigned rn = INSTR (9, 5);
1412 unsigned rt = INSTR (4, 0);
1413
1414 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1415 /* The target register may not be SP but the source may be. */
1416 aarch64_set_mem_u16 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK)
1417 + SCALE (offset, 16),
1418 aarch64_get_reg_u16 (cpu, rt, NO_SP));
1419 }
1420
1421 /* 32 bit store short unscaled signed 9 bit with pre- or post-writeback. */
1422 static void
1423 strh_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
1424 {
1425 unsigned rn = INSTR (9, 5);
1426 unsigned rt = INSTR (4, 0);
1427 uint64_t address;
1428
1429 if (rn == rt && wb != NoWriteBack)
1430 HALT_UNALLOC;
1431
1432 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1433
1434 if (wb != Post)
1435 address += offset;
1436
1437 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1438 aarch64_set_mem_u16 (cpu, address, aarch64_get_reg_u16 (cpu, rt, NO_SP));
1439
1440 if (wb == Post)
1441 address += offset;
1442
1443 if (wb != NoWriteBack)
1444 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
1445 }
1446
1447 /* 32 bit store short scaled or unscaled zero-
1448 or sign-extended 32-bit register offset. */
1449 static void
1450 strh_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1451 {
1452 unsigned rm = INSTR (20, 16);
1453 unsigned rn = INSTR (9, 5);
1454 unsigned rt = INSTR (4, 0);
1455 /* rn may reference SP, rm and rt must reference ZR */
1456
1457 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1458 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP), extension);
1459 uint64_t displacement = OPT_SCALE (extended, 16, scaling);
1460
1461 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1462 aarch64_set_mem_u16 (cpu, address + displacement,
1463 aarch64_get_reg_u16 (cpu, rt, NO_SP));
1464 }
1465
1466 /* Prefetch unsigned 12 bit. */
1467 static void
1468 prfm_abs (sim_cpu *cpu, uint32_t offset)
1469 {
1470 /* instr[4,0] = prfop : 00000 ==> PLDL1KEEP, 00001 ==> PLDL1STRM,
1471 00010 ==> PLDL2KEEP, 00001 ==> PLDL2STRM,
1472 00100 ==> PLDL3KEEP, 00101 ==> PLDL3STRM,
1473 10000 ==> PSTL1KEEP, 10001 ==> PSTL1STRM,
1474 10010 ==> PSTL2KEEP, 10001 ==> PSTL2STRM,
1475 10100 ==> PSTL3KEEP, 10101 ==> PSTL3STRM,
1476 ow ==> UNALLOC
1477 PrfOp prfop = prfop (instr, 4, 0);
1478 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK)
1479 + SCALE (offset, 64). */
1480
1481 /* TODO : implement prefetch of address. */
1482 }
1483
1484 /* Prefetch scaled or unscaled zero- or sign-extended 32-bit register offset. */
1485 static void
1486 prfm_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
1487 {
1488 /* instr[4,0] = prfop : 00000 ==> PLDL1KEEP, 00001 ==> PLDL1STRM,
1489 00010 ==> PLDL2KEEP, 00001 ==> PLDL2STRM,
1490 00100 ==> PLDL3KEEP, 00101 ==> PLDL3STRM,
1491 10000 ==> PSTL1KEEP, 10001 ==> PSTL1STRM,
1492 10010 ==> PSTL2KEEP, 10001 ==> PSTL2STRM,
1493 10100 ==> PSTL3KEEP, 10101 ==> PSTL3STRM,
1494 ow ==> UNALLOC
1495 rn may reference SP, rm may only reference ZR
1496 PrfOp prfop = prfop (instr, 4, 0);
1497 uint64_t base = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1498 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
1499 extension);
1500 uint64_t displacement = OPT_SCALE (extended, 64, scaling);
1501 uint64_t address = base + displacement. */
1502
1503 /* TODO : implement prefetch of address */
1504 }
1505
1506 /* 64 bit pc-relative prefetch. */
1507 static void
1508 prfm_pcrel (sim_cpu *cpu, int32_t offset)
1509 {
1510 /* instr[4,0] = prfop : 00000 ==> PLDL1KEEP, 00001 ==> PLDL1STRM,
1511 00010 ==> PLDL2KEEP, 00001 ==> PLDL2STRM,
1512 00100 ==> PLDL3KEEP, 00101 ==> PLDL3STRM,
1513 10000 ==> PSTL1KEEP, 10001 ==> PSTL1STRM,
1514 10010 ==> PSTL2KEEP, 10001 ==> PSTL2STRM,
1515 10100 ==> PSTL3KEEP, 10101 ==> PSTL3STRM,
1516 ow ==> UNALLOC
1517 PrfOp prfop = prfop (instr, 4, 0);
1518 uint64_t address = aarch64_get_PC (cpu) + offset. */
1519
1520 /* TODO : implement this */
1521 }
1522
1523 /* Load-store exclusive. */
1524
1525 static void
1526 ldxr (sim_cpu *cpu)
1527 {
1528 unsigned rn = INSTR (9, 5);
1529 unsigned rt = INSTR (4, 0);
1530 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1531 int size = INSTR (31, 30);
1532 /* int ordered = INSTR (15, 15); */
1533 /* int exclusive = ! INSTR (23, 23); */
1534
1535 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1536 switch (size)
1537 {
1538 case 0:
1539 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u8 (cpu, address));
1540 break;
1541 case 1:
1542 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u16 (cpu, address));
1543 break;
1544 case 2:
1545 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u32 (cpu, address));
1546 break;
1547 case 3:
1548 aarch64_set_reg_u64 (cpu, rt, NO_SP, aarch64_get_mem_u64 (cpu, address));
1549 break;
1550 }
1551 }
1552
1553 static void
1554 stxr (sim_cpu *cpu)
1555 {
1556 unsigned rn = INSTR (9, 5);
1557 unsigned rt = INSTR (4, 0);
1558 unsigned rs = INSTR (20, 16);
1559 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1560 int size = INSTR (31, 30);
1561 uint64_t data = aarch64_get_reg_u64 (cpu, rt, NO_SP);
1562
1563 switch (size)
1564 {
1565 case 0: aarch64_set_mem_u8 (cpu, address, data); break;
1566 case 1: aarch64_set_mem_u16 (cpu, address, data); break;
1567 case 2: aarch64_set_mem_u32 (cpu, address, data); break;
1568 case 3: aarch64_set_mem_u64 (cpu, address, data); break;
1569 }
1570
1571 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1572 aarch64_set_reg_u64 (cpu, rs, NO_SP, 0); /* Always exclusive... */
1573 }
1574
1575 static void
1576 dexLoadLiteral (sim_cpu *cpu)
1577 {
1578 /* instr[29,27] == 011
1579 instr[25,24] == 00
1580 instr[31,30:26] = opc: 000 ==> LDRW, 001 ==> FLDRS
1581 010 ==> LDRX, 011 ==> FLDRD
1582 100 ==> LDRSW, 101 ==> FLDRQ
1583 110 ==> PRFM, 111 ==> UNALLOC
1584 instr[26] ==> V : 0 ==> GReg, 1 ==> FReg
1585 instr[23, 5] == simm19 */
1586
1587 /* unsigned rt = INSTR (4, 0); */
1588 uint32_t dispatch = (INSTR (31, 30) << 1) | INSTR (26, 26);
1589 int32_t imm = simm32 (aarch64_get_instr (cpu), 23, 5);
1590
1591 switch (dispatch)
1592 {
1593 case 0: ldr32_pcrel (cpu, imm); break;
1594 case 1: fldrs_pcrel (cpu, imm); break;
1595 case 2: ldr_pcrel (cpu, imm); break;
1596 case 3: fldrd_pcrel (cpu, imm); break;
1597 case 4: ldrsw_pcrel (cpu, imm); break;
1598 case 5: fldrq_pcrel (cpu, imm); break;
1599 case 6: prfm_pcrel (cpu, imm); break;
1600 case 7:
1601 default:
1602 HALT_UNALLOC;
1603 }
1604 }
1605
1606 /* Immediate arithmetic
1607 The aimm argument is a 12 bit unsigned value or a 12 bit unsigned
1608 value left shifted by 12 bits (done at decode).
1609
1610 N.B. the register args (dest, source) can normally be Xn or SP.
1611 the exception occurs for flag setting instructions which may
1612 only use Xn for the output (dest). */
1613
1614 /* 32 bit add immediate. */
1615 static void
1616 add32 (sim_cpu *cpu, uint32_t aimm)
1617 {
1618 unsigned rn = INSTR (9, 5);
1619 unsigned rd = INSTR (4, 0);
1620
1621 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1622 aarch64_set_reg_u64 (cpu, rd, SP_OK,
1623 aarch64_get_reg_u32 (cpu, rn, SP_OK) + aimm);
1624 }
1625
1626 /* 64 bit add immediate. */
1627 static void
1628 add64 (sim_cpu *cpu, uint32_t aimm)
1629 {
1630 unsigned rn = INSTR (9, 5);
1631 unsigned rd = INSTR (4, 0);
1632
1633 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1634 aarch64_set_reg_u64 (cpu, rd, SP_OK,
1635 aarch64_get_reg_u64 (cpu, rn, SP_OK) + aimm);
1636 }
1637
1638 static void
1639 set_flags_for_add32 (sim_cpu *cpu, int32_t value1, int32_t value2)
1640 {
1641 int32_t result = value1 + value2;
1642 int64_t sresult = (int64_t) value1 + (int64_t) value2;
1643 uint64_t uresult = (uint64_t)(uint32_t) value1
1644 + (uint64_t)(uint32_t) value2;
1645 uint32_t flags = 0;
1646
1647 if (result == 0)
1648 flags |= Z;
1649
1650 if (result & (1 << 31))
1651 flags |= N;
1652
1653 if (uresult != (uint32_t)result)
1654 flags |= C;
1655
1656 if (sresult != result)
1657 flags |= V;
1658
1659 aarch64_set_CPSR (cpu, flags);
1660 }
1661
1662 #define NEG(a) (((a) & signbit) == signbit)
1663 #define POS(a) (((a) & signbit) == 0)
1664
1665 static void
1666 set_flags_for_add64 (sim_cpu *cpu, uint64_t value1, uint64_t value2)
1667 {
1668 uint64_t result = value1 + value2;
1669 uint32_t flags = 0;
1670 uint64_t signbit = 1ULL << 63;
1671
1672 if (result == 0)
1673 flags |= Z;
1674
1675 if (NEG (result))
1676 flags |= N;
1677
1678 if ( (NEG (value1) && NEG (value2))
1679 || (NEG (value1) && POS (result))
1680 || (NEG (value2) && POS (result)))
1681 flags |= C;
1682
1683 if ( (NEG (value1) && NEG (value2) && POS (result))
1684 || (POS (value1) && POS (value2) && NEG (result)))
1685 flags |= V;
1686
1687 aarch64_set_CPSR (cpu, flags);
1688 }
1689
1690 static void
1691 set_flags_for_sub32 (sim_cpu *cpu, uint32_t value1, uint32_t value2)
1692 {
1693 uint32_t result = value1 - value2;
1694 uint32_t flags = 0;
1695 uint32_t signbit = 1U << 31;
1696
1697 if (result == 0)
1698 flags |= Z;
1699
1700 if (NEG (result))
1701 flags |= N;
1702
1703 if ( (NEG (value1) && POS (value2))
1704 || (NEG (value1) && POS (result))
1705 || (POS (value2) && POS (result)))
1706 flags |= C;
1707
1708 if ( (NEG (value1) && POS (value2) && POS (result))
1709 || (POS (value1) && NEG (value2) && NEG (result)))
1710 flags |= V;
1711
1712 aarch64_set_CPSR (cpu, flags);
1713 }
1714
1715 static void
1716 set_flags_for_sub64 (sim_cpu *cpu, uint64_t value1, uint64_t value2)
1717 {
1718 uint64_t result = value1 - value2;
1719 uint32_t flags = 0;
1720 uint64_t signbit = 1ULL << 63;
1721
1722 if (result == 0)
1723 flags |= Z;
1724
1725 if (NEG (result))
1726 flags |= N;
1727
1728 if ( (NEG (value1) && POS (value2))
1729 || (NEG (value1) && POS (result))
1730 || (POS (value2) && POS (result)))
1731 flags |= C;
1732
1733 if ( (NEG (value1) && POS (value2) && POS (result))
1734 || (POS (value1) && NEG (value2) && NEG (result)))
1735 flags |= V;
1736
1737 aarch64_set_CPSR (cpu, flags);
1738 }
1739
1740 static void
1741 set_flags_for_binop32 (sim_cpu *cpu, uint32_t result)
1742 {
1743 uint32_t flags = 0;
1744
1745 if (result == 0)
1746 flags |= Z;
1747 else
1748 flags &= ~ Z;
1749
1750 if (result & (1 << 31))
1751 flags |= N;
1752 else
1753 flags &= ~ N;
1754
1755 aarch64_set_CPSR (cpu, flags);
1756 }
1757
1758 static void
1759 set_flags_for_binop64 (sim_cpu *cpu, uint64_t result)
1760 {
1761 uint32_t flags = 0;
1762
1763 if (result == 0)
1764 flags |= Z;
1765 else
1766 flags &= ~ Z;
1767
1768 if (result & (1ULL << 63))
1769 flags |= N;
1770 else
1771 flags &= ~ N;
1772
1773 aarch64_set_CPSR (cpu, flags);
1774 }
1775
1776 /* 32 bit add immediate set flags. */
1777 static void
1778 adds32 (sim_cpu *cpu, uint32_t aimm)
1779 {
1780 unsigned rn = INSTR (9, 5);
1781 unsigned rd = INSTR (4, 0);
1782 /* TODO : do we need to worry about signs here? */
1783 int32_t value1 = aarch64_get_reg_s32 (cpu, rn, SP_OK);
1784
1785 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1786 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + aimm);
1787 set_flags_for_add32 (cpu, value1, aimm);
1788 }
1789
1790 /* 64 bit add immediate set flags. */
1791 static void
1792 adds64 (sim_cpu *cpu, uint32_t aimm)
1793 {
1794 unsigned rn = INSTR (9, 5);
1795 unsigned rd = INSTR (4, 0);
1796 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1797 uint64_t value2 = aimm;
1798
1799 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1800 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2);
1801 set_flags_for_add64 (cpu, value1, value2);
1802 }
1803
1804 /* 32 bit sub immediate. */
1805 static void
1806 sub32 (sim_cpu *cpu, uint32_t aimm)
1807 {
1808 unsigned rn = INSTR (9, 5);
1809 unsigned rd = INSTR (4, 0);
1810
1811 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1812 aarch64_set_reg_u64 (cpu, rd, SP_OK,
1813 aarch64_get_reg_u32 (cpu, rn, SP_OK) - aimm);
1814 }
1815
1816 /* 64 bit sub immediate. */
1817 static void
1818 sub64 (sim_cpu *cpu, uint32_t aimm)
1819 {
1820 unsigned rn = INSTR (9, 5);
1821 unsigned rd = INSTR (4, 0);
1822
1823 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1824 aarch64_set_reg_u64 (cpu, rd, SP_OK,
1825 aarch64_get_reg_u64 (cpu, rn, SP_OK) - aimm);
1826 }
1827
1828 /* 32 bit sub immediate set flags. */
1829 static void
1830 subs32 (sim_cpu *cpu, uint32_t aimm)
1831 {
1832 unsigned rn = INSTR (9, 5);
1833 unsigned rd = INSTR (4, 0);
1834 uint32_t value1 = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1835 uint32_t value2 = aimm;
1836
1837 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1838 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 - value2);
1839 set_flags_for_sub32 (cpu, value1, value2);
1840 }
1841
1842 /* 64 bit sub immediate set flags. */
1843 static void
1844 subs64 (sim_cpu *cpu, uint32_t aimm)
1845 {
1846 unsigned rn = INSTR (9, 5);
1847 unsigned rd = INSTR (4, 0);
1848 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, SP_OK);
1849 uint32_t value2 = aimm;
1850
1851 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1852 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 - value2);
1853 set_flags_for_sub64 (cpu, value1, value2);
1854 }
1855
1856 /* Data Processing Register. */
1857
1858 /* First two helpers to perform the shift operations. */
1859
1860 static inline uint32_t
1861 shifted32 (uint32_t value, Shift shift, uint32_t count)
1862 {
1863 switch (shift)
1864 {
1865 default:
1866 case LSL:
1867 return (value << count);
1868 case LSR:
1869 return (value >> count);
1870 case ASR:
1871 {
1872 int32_t svalue = value;
1873 return (svalue >> count);
1874 }
1875 case ROR:
1876 {
1877 uint32_t top = value >> count;
1878 uint32_t bottom = value << (32 - count);
1879 return (bottom | top);
1880 }
1881 }
1882 }
1883
1884 static inline uint64_t
1885 shifted64 (uint64_t value, Shift shift, uint32_t count)
1886 {
1887 switch (shift)
1888 {
1889 default:
1890 case LSL:
1891 return (value << count);
1892 case LSR:
1893 return (value >> count);
1894 case ASR:
1895 {
1896 int64_t svalue = value;
1897 return (svalue >> count);
1898 }
1899 case ROR:
1900 {
1901 uint64_t top = value >> count;
1902 uint64_t bottom = value << (64 - count);
1903 return (bottom | top);
1904 }
1905 }
1906 }
1907
1908 /* Arithmetic shifted register.
1909 These allow an optional LSL, ASR or LSR to the second source
1910 register with a count up to the register bit count.
1911
1912 N.B register args may not be SP. */
1913
1914 /* 32 bit ADD shifted register. */
1915 static void
1916 add32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
1917 {
1918 unsigned rm = INSTR (20, 16);
1919 unsigned rn = INSTR (9, 5);
1920 unsigned rd = INSTR (4, 0);
1921
1922 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1923 aarch64_set_reg_u64 (cpu, rd, NO_SP,
1924 aarch64_get_reg_u32 (cpu, rn, NO_SP)
1925 + shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP),
1926 shift, count));
1927 }
1928
1929 /* 64 bit ADD shifted register. */
1930 static void
1931 add64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
1932 {
1933 unsigned rm = INSTR (20, 16);
1934 unsigned rn = INSTR (9, 5);
1935 unsigned rd = INSTR (4, 0);
1936
1937 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1938 aarch64_set_reg_u64 (cpu, rd, NO_SP,
1939 aarch64_get_reg_u64 (cpu, rn, NO_SP)
1940 + shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP),
1941 shift, count));
1942 }
1943
1944 /* 32 bit ADD shifted register setting flags. */
1945 static void
1946 adds32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
1947 {
1948 unsigned rm = INSTR (20, 16);
1949 unsigned rn = INSTR (9, 5);
1950 unsigned rd = INSTR (4, 0);
1951
1952 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
1953 uint32_t value2 = shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP),
1954 shift, count);
1955
1956 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1957 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2);
1958 set_flags_for_add32 (cpu, value1, value2);
1959 }
1960
1961 /* 64 bit ADD shifted register setting flags. */
1962 static void
1963 adds64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
1964 {
1965 unsigned rm = INSTR (20, 16);
1966 unsigned rn = INSTR (9, 5);
1967 unsigned rd = INSTR (4, 0);
1968
1969 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
1970 uint64_t value2 = shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP),
1971 shift, count);
1972
1973 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1974 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2);
1975 set_flags_for_add64 (cpu, value1, value2);
1976 }
1977
1978 /* 32 bit SUB shifted register. */
1979 static void
1980 sub32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
1981 {
1982 unsigned rm = INSTR (20, 16);
1983 unsigned rn = INSTR (9, 5);
1984 unsigned rd = INSTR (4, 0);
1985
1986 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
1987 aarch64_set_reg_u64 (cpu, rd, NO_SP,
1988 aarch64_get_reg_u32 (cpu, rn, NO_SP)
1989 - shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP),
1990 shift, count));
1991 }
1992
1993 /* 64 bit SUB shifted register. */
1994 static void
1995 sub64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
1996 {
1997 unsigned rm = INSTR (20, 16);
1998 unsigned rn = INSTR (9, 5);
1999 unsigned rd = INSTR (4, 0);
2000
2001 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2002 aarch64_set_reg_u64 (cpu, rd, NO_SP,
2003 aarch64_get_reg_u64 (cpu, rn, NO_SP)
2004 - shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP),
2005 shift, count));
2006 }
2007
2008 /* 32 bit SUB shifted register setting flags. */
2009 static void
2010 subs32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
2011 {
2012 unsigned rm = INSTR (20, 16);
2013 unsigned rn = INSTR (9, 5);
2014 unsigned rd = INSTR (4, 0);
2015
2016 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
2017 uint32_t value2 = shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP),
2018 shift, count);
2019
2020 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2021 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 - value2);
2022 set_flags_for_sub32 (cpu, value1, value2);
2023 }
2024
2025 /* 64 bit SUB shifted register setting flags. */
2026 static void
2027 subs64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
2028 {
2029 unsigned rm = INSTR (20, 16);
2030 unsigned rn = INSTR (9, 5);
2031 unsigned rd = INSTR (4, 0);
2032
2033 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
2034 uint64_t value2 = shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP),
2035 shift, count);
2036
2037 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2038 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 - value2);
2039 set_flags_for_sub64 (cpu, value1, value2);
2040 }
2041
2042 /* First a couple more helpers to fetch the
2043 relevant source register element either
2044 sign or zero extended as required by the
2045 extension value. */
2046
2047 static uint32_t
2048 extreg32 (sim_cpu *cpu, unsigned int lo, Extension extension)
2049 {
2050 switch (extension)
2051 {
2052 case UXTB: return aarch64_get_reg_u8 (cpu, lo, NO_SP);
2053 case UXTH: return aarch64_get_reg_u16 (cpu, lo, NO_SP);
2054 case UXTW: /* Fall through. */
2055 case UXTX: return aarch64_get_reg_u32 (cpu, lo, NO_SP);
2056 case SXTB: return aarch64_get_reg_s8 (cpu, lo, NO_SP);
2057 case SXTH: return aarch64_get_reg_s16 (cpu, lo, NO_SP);
2058 case SXTW: /* Fall through. */
2059 case SXTX: /* Fall through. */
2060 default: return aarch64_get_reg_s32 (cpu, lo, NO_SP);
2061 }
2062 }
2063
2064 static uint64_t
2065 extreg64 (sim_cpu *cpu, unsigned int lo, Extension extension)
2066 {
2067 switch (extension)
2068 {
2069 case UXTB: return aarch64_get_reg_u8 (cpu, lo, NO_SP);
2070 case UXTH: return aarch64_get_reg_u16 (cpu, lo, NO_SP);
2071 case UXTW: return aarch64_get_reg_u32 (cpu, lo, NO_SP);
2072 case UXTX: return aarch64_get_reg_u64 (cpu, lo, NO_SP);
2073 case SXTB: return aarch64_get_reg_s8 (cpu, lo, NO_SP);
2074 case SXTH: return aarch64_get_reg_s16 (cpu, lo, NO_SP);
2075 case SXTW: return aarch64_get_reg_s32 (cpu, lo, NO_SP);
2076 case SXTX:
2077 default: return aarch64_get_reg_s64 (cpu, lo, NO_SP);
2078 }
2079 }
2080
2081 /* Arithmetic extending register
2082 These allow an optional sign extension of some portion of the
2083 second source register followed by an optional left shift of
2084 between 1 and 4 bits (i.e. a shift of 0-4 bits???)
2085
2086 N.B output (dest) and first input arg (source) may normally be Xn
2087 or SP. However, for flag setting operations dest can only be
2088 Xn. Second input registers are always Xn. */
2089
2090 /* 32 bit ADD extending register. */
2091 static void
2092 add32_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2093 {
2094 unsigned rm = INSTR (20, 16);
2095 unsigned rn = INSTR (9, 5);
2096 unsigned rd = INSTR (4, 0);
2097
2098 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2099 aarch64_set_reg_u64 (cpu, rd, SP_OK,
2100 aarch64_get_reg_u32 (cpu, rn, SP_OK)
2101 + (extreg32 (cpu, rm, extension) << shift));
2102 }
2103
2104 /* 64 bit ADD extending register.
2105 N.B. This subsumes the case with 64 bit source2 and UXTX #n or LSL #0. */
2106 static void
2107 add64_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2108 {
2109 unsigned rm = INSTR (20, 16);
2110 unsigned rn = INSTR (9, 5);
2111 unsigned rd = INSTR (4, 0);
2112
2113 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2114 aarch64_set_reg_u64 (cpu, rd, SP_OK,
2115 aarch64_get_reg_u64 (cpu, rn, SP_OK)
2116 + (extreg64 (cpu, rm, extension) << shift));
2117 }
2118
2119 /* 32 bit ADD extending register setting flags. */
2120 static void
2121 adds32_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2122 {
2123 unsigned rm = INSTR (20, 16);
2124 unsigned rn = INSTR (9, 5);
2125 unsigned rd = INSTR (4, 0);
2126
2127 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, SP_OK);
2128 uint32_t value2 = extreg32 (cpu, rm, extension) << shift;
2129
2130 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2131 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2);
2132 set_flags_for_add32 (cpu, value1, value2);
2133 }
2134
2135 /* 64 bit ADD extending register setting flags */
2136 /* N.B. this subsumes the case with 64 bit source2 and UXTX #n or LSL #0 */
2137 static void
2138 adds64_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2139 {
2140 unsigned rm = INSTR (20, 16);
2141 unsigned rn = INSTR (9, 5);
2142 unsigned rd = INSTR (4, 0);
2143
2144 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, SP_OK);
2145 uint64_t value2 = extreg64 (cpu, rm, extension) << shift;
2146
2147 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2148 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2);
2149 set_flags_for_add64 (cpu, value1, value2);
2150 }
2151
2152 /* 32 bit SUB extending register. */
2153 static void
2154 sub32_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2155 {
2156 unsigned rm = INSTR (20, 16);
2157 unsigned rn = INSTR (9, 5);
2158 unsigned rd = INSTR (4, 0);
2159
2160 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2161 aarch64_set_reg_u64 (cpu, rd, SP_OK,
2162 aarch64_get_reg_u32 (cpu, rn, SP_OK)
2163 - (extreg32 (cpu, rm, extension) << shift));
2164 }
2165
2166 /* 64 bit SUB extending register. */
2167 /* N.B. this subsumes the case with 64 bit source2 and UXTX #n or LSL #0. */
2168 static void
2169 sub64_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2170 {
2171 unsigned rm = INSTR (20, 16);
2172 unsigned rn = INSTR (9, 5);
2173 unsigned rd = INSTR (4, 0);
2174
2175 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2176 aarch64_set_reg_u64 (cpu, rd, SP_OK,
2177 aarch64_get_reg_u64 (cpu, rn, SP_OK)
2178 - (extreg64 (cpu, rm, extension) << shift));
2179 }
2180
2181 /* 32 bit SUB extending register setting flags. */
2182 static void
2183 subs32_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2184 {
2185 unsigned rm = INSTR (20, 16);
2186 unsigned rn = INSTR (9, 5);
2187 unsigned rd = INSTR (4, 0);
2188
2189 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, SP_OK);
2190 uint32_t value2 = extreg32 (cpu, rm, extension) << shift;
2191
2192 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2193 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 - value2);
2194 set_flags_for_sub32 (cpu, value1, value2);
2195 }
2196
2197 /* 64 bit SUB extending register setting flags */
2198 /* N.B. this subsumes the case with 64 bit source2 and UXTX #n or LSL #0 */
2199 static void
2200 subs64_ext (sim_cpu *cpu, Extension extension, uint32_t shift)
2201 {
2202 unsigned rm = INSTR (20, 16);
2203 unsigned rn = INSTR (9, 5);
2204 unsigned rd = INSTR (4, 0);
2205
2206 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, SP_OK);
2207 uint64_t value2 = extreg64 (cpu, rm, extension) << shift;
2208
2209 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2210 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 - value2);
2211 set_flags_for_sub64 (cpu, value1, value2);
2212 }
2213
2214 static void
2215 dexAddSubtractImmediate (sim_cpu *cpu)
2216 {
2217 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
2218 instr[30] = op : 0 ==> ADD, 1 ==> SUB
2219 instr[29] = set : 0 ==> no flags, 1 ==> set flags
2220 instr[28,24] = 10001
2221 instr[23,22] = shift : 00 == LSL#0, 01 = LSL#12 1x = UNALLOC
2222 instr[21,10] = uimm12
2223 instr[9,5] = Rn
2224 instr[4,0] = Rd */
2225
2226 /* N.B. the shift is applied at decode before calling the add/sub routine. */
2227 uint32_t shift = INSTR (23, 22);
2228 uint32_t imm = INSTR (21, 10);
2229 uint32_t dispatch = INSTR (31, 29);
2230
2231 NYI_assert (28, 24, 0x11);
2232
2233 if (shift > 1)
2234 HALT_UNALLOC;
2235
2236 if (shift)
2237 imm <<= 12;
2238
2239 switch (dispatch)
2240 {
2241 case 0: add32 (cpu, imm); break;
2242 case 1: adds32 (cpu, imm); break;
2243 case 2: sub32 (cpu, imm); break;
2244 case 3: subs32 (cpu, imm); break;
2245 case 4: add64 (cpu, imm); break;
2246 case 5: adds64 (cpu, imm); break;
2247 case 6: sub64 (cpu, imm); break;
2248 case 7: subs64 (cpu, imm); break;
2249 }
2250 }
2251
2252 static void
2253 dexAddSubtractShiftedRegister (sim_cpu *cpu)
2254 {
2255 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
2256 instr[30,29] = op : 00 ==> ADD, 01 ==> ADDS, 10 ==> SUB, 11 ==> SUBS
2257 instr[28,24] = 01011
2258 instr[23,22] = shift : 0 ==> LSL, 1 ==> LSR, 2 ==> ASR, 3 ==> UNALLOC
2259 instr[21] = 0
2260 instr[20,16] = Rm
2261 instr[15,10] = count : must be 0xxxxx for 32 bit
2262 instr[9,5] = Rn
2263 instr[4,0] = Rd */
2264
2265 uint32_t size = INSTR (31, 31);
2266 uint32_t count = INSTR (15, 10);
2267 Shift shiftType = INSTR (23, 22);
2268
2269 NYI_assert (28, 24, 0x0B);
2270 NYI_assert (21, 21, 0);
2271
2272 /* Shift encoded as ROR is unallocated. */
2273 if (shiftType == ROR)
2274 HALT_UNALLOC;
2275
2276 /* 32 bit operations must have count[5] = 0
2277 or else we have an UNALLOC. */
2278 if (size == 0 && uimm (count, 5, 5))
2279 HALT_UNALLOC;
2280
2281 /* Dispatch on size:op i.e instr [31,29]. */
2282 switch (INSTR (31, 29))
2283 {
2284 case 0: add32_shift (cpu, shiftType, count); break;
2285 case 1: adds32_shift (cpu, shiftType, count); break;
2286 case 2: sub32_shift (cpu, shiftType, count); break;
2287 case 3: subs32_shift (cpu, shiftType, count); break;
2288 case 4: add64_shift (cpu, shiftType, count); break;
2289 case 5: adds64_shift (cpu, shiftType, count); break;
2290 case 6: sub64_shift (cpu, shiftType, count); break;
2291 case 7: subs64_shift (cpu, shiftType, count); break;
2292 }
2293 }
2294
2295 static void
2296 dexAddSubtractExtendedRegister (sim_cpu *cpu)
2297 {
2298 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
2299 instr[30] = op : 0 ==> ADD, 1 ==> SUB
2300 instr[29] = set? : 0 ==> no flags, 1 ==> set flags
2301 instr[28,24] = 01011
2302 instr[23,22] = opt : 0 ==> ok, 1,2,3 ==> UNALLOC
2303 instr[21] = 1
2304 instr[20,16] = Rm
2305 instr[15,13] = option : 000 ==> UXTB, 001 ==> UXTH,
2306 000 ==> LSL|UXTW, 001 ==> UXTZ,
2307 000 ==> SXTB, 001 ==> SXTH,
2308 000 ==> SXTW, 001 ==> SXTX,
2309 instr[12,10] = shift : 0,1,2,3,4 ==> ok, 5,6,7 ==> UNALLOC
2310 instr[9,5] = Rn
2311 instr[4,0] = Rd */
2312
2313 Extension extensionType = INSTR (15, 13);
2314 uint32_t shift = INSTR (12, 10);
2315
2316 NYI_assert (28, 24, 0x0B);
2317 NYI_assert (21, 21, 1);
2318
2319 /* Shift may not exceed 4. */
2320 if (shift > 4)
2321 HALT_UNALLOC;
2322
2323 /* Dispatch on size:op:set?. */
2324 switch (INSTR (31, 29))
2325 {
2326 case 0: add32_ext (cpu, extensionType, shift); break;
2327 case 1: adds32_ext (cpu, extensionType, shift); break;
2328 case 2: sub32_ext (cpu, extensionType, shift); break;
2329 case 3: subs32_ext (cpu, extensionType, shift); break;
2330 case 4: add64_ext (cpu, extensionType, shift); break;
2331 case 5: adds64_ext (cpu, extensionType, shift); break;
2332 case 6: sub64_ext (cpu, extensionType, shift); break;
2333 case 7: subs64_ext (cpu, extensionType, shift); break;
2334 }
2335 }
2336
2337 /* Conditional data processing
2338 Condition register is implicit 3rd source. */
2339
2340 /* 32 bit add with carry. */
2341 /* N.B register args may not be SP. */
2342
2343 static void
2344 adc32 (sim_cpu *cpu)
2345 {
2346 unsigned rm = INSTR (20, 16);
2347 unsigned rn = INSTR (9, 5);
2348 unsigned rd = INSTR (4, 0);
2349
2350 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2351 aarch64_set_reg_u64 (cpu, rd, NO_SP,
2352 aarch64_get_reg_u32 (cpu, rn, NO_SP)
2353 + aarch64_get_reg_u32 (cpu, rm, NO_SP)
2354 + IS_SET (C));
2355 }
2356
2357 /* 64 bit add with carry */
2358 static void
2359 adc64 (sim_cpu *cpu)
2360 {
2361 unsigned rm = INSTR (20, 16);
2362 unsigned rn = INSTR (9, 5);
2363 unsigned rd = INSTR (4, 0);
2364
2365 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2366 aarch64_set_reg_u64 (cpu, rd, NO_SP,
2367 aarch64_get_reg_u64 (cpu, rn, NO_SP)
2368 + aarch64_get_reg_u64 (cpu, rm, NO_SP)
2369 + IS_SET (C));
2370 }
2371
2372 /* 32 bit add with carry setting flags. */
2373 static void
2374 adcs32 (sim_cpu *cpu)
2375 {
2376 unsigned rm = INSTR (20, 16);
2377 unsigned rn = INSTR (9, 5);
2378 unsigned rd = INSTR (4, 0);
2379
2380 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
2381 uint32_t value2 = aarch64_get_reg_u32 (cpu, rm, NO_SP);
2382 uint32_t carry = IS_SET (C);
2383
2384 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2385 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2 + carry);
2386 set_flags_for_add32 (cpu, value1, value2 + carry);
2387 }
2388
2389 /* 64 bit add with carry setting flags. */
2390 static void
2391 adcs64 (sim_cpu *cpu)
2392 {
2393 unsigned rm = INSTR (20, 16);
2394 unsigned rn = INSTR (9, 5);
2395 unsigned rd = INSTR (4, 0);
2396
2397 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
2398 uint64_t value2 = aarch64_get_reg_u64 (cpu, rm, NO_SP);
2399 uint64_t carry = IS_SET (C);
2400
2401 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2402 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 + value2 + carry);
2403 set_flags_for_add64 (cpu, value1, value2 + carry);
2404 }
2405
2406 /* 32 bit sub with carry. */
2407 static void
2408 sbc32 (sim_cpu *cpu)
2409 {
2410 unsigned rm = INSTR (20, 16);
2411 unsigned rn = INSTR (9, 5); /* ngc iff rn == 31. */
2412 unsigned rd = INSTR (4, 0);
2413
2414 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2415 aarch64_set_reg_u64 (cpu, rd, NO_SP,
2416 aarch64_get_reg_u32 (cpu, rn, NO_SP)
2417 - aarch64_get_reg_u32 (cpu, rm, NO_SP)
2418 - 1 + IS_SET (C));
2419 }
2420
2421 /* 64 bit sub with carry */
2422 static void
2423 sbc64 (sim_cpu *cpu)
2424 {
2425 unsigned rm = INSTR (20, 16);
2426 unsigned rn = INSTR (9, 5);
2427 unsigned rd = INSTR (4, 0);
2428
2429 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2430 aarch64_set_reg_u64 (cpu, rd, NO_SP,
2431 aarch64_get_reg_u64 (cpu, rn, NO_SP)
2432 - aarch64_get_reg_u64 (cpu, rm, NO_SP)
2433 - 1 + IS_SET (C));
2434 }
2435
2436 /* 32 bit sub with carry setting flags */
2437 static void
2438 sbcs32 (sim_cpu *cpu)
2439 {
2440 unsigned rm = INSTR (20, 16);
2441 unsigned rn = INSTR (9, 5);
2442 unsigned rd = INSTR (4, 0);
2443
2444 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
2445 uint32_t value2 = aarch64_get_reg_u32 (cpu, rm, NO_SP);
2446 uint32_t carry = IS_SET (C);
2447 uint32_t result = value1 - value2 + 1 - carry;
2448
2449 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2450 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
2451 set_flags_for_sub32 (cpu, value1, value2 + 1 - carry);
2452 }
2453
2454 /* 64 bit sub with carry setting flags */
2455 static void
2456 sbcs64 (sim_cpu *cpu)
2457 {
2458 unsigned rm = INSTR (20, 16);
2459 unsigned rn = INSTR (9, 5);
2460 unsigned rd = INSTR (4, 0);
2461
2462 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
2463 uint64_t value2 = aarch64_get_reg_u64 (cpu, rm, NO_SP);
2464 uint64_t carry = IS_SET (C);
2465 uint64_t result = value1 - value2 + 1 - carry;
2466
2467 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2468 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
2469 set_flags_for_sub64 (cpu, value1, value2 + 1 - carry);
2470 }
2471
2472 static void
2473 dexAddSubtractWithCarry (sim_cpu *cpu)
2474 {
2475 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
2476 instr[30] = op : 0 ==> ADC, 1 ==> SBC
2477 instr[29] = set? : 0 ==> no flags, 1 ==> set flags
2478 instr[28,21] = 1 1010 000
2479 instr[20,16] = Rm
2480 instr[15,10] = op2 : 00000 ==> ok, ow ==> UNALLOC
2481 instr[9,5] = Rn
2482 instr[4,0] = Rd */
2483
2484 uint32_t op2 = INSTR (15, 10);
2485
2486 NYI_assert (28, 21, 0xD0);
2487
2488 if (op2 != 0)
2489 HALT_UNALLOC;
2490
2491 /* Dispatch on size:op:set?. */
2492 switch (INSTR (31, 29))
2493 {
2494 case 0: adc32 (cpu); break;
2495 case 1: adcs32 (cpu); break;
2496 case 2: sbc32 (cpu); break;
2497 case 3: sbcs32 (cpu); break;
2498 case 4: adc64 (cpu); break;
2499 case 5: adcs64 (cpu); break;
2500 case 6: sbc64 (cpu); break;
2501 case 7: sbcs64 (cpu); break;
2502 }
2503 }
2504
2505 static uint32_t
2506 testConditionCode (sim_cpu *cpu, CondCode cc)
2507 {
2508 /* This should be reduceable to branchless logic
2509 by some careful testing of bits in CC followed
2510 by the requisite masking and combining of bits
2511 from the flag register.
2512
2513 For now we do it with a switch. */
2514 int res;
2515
2516 switch (cc)
2517 {
2518 case EQ: res = IS_SET (Z); break;
2519 case NE: res = IS_CLEAR (Z); break;
2520 case CS: res = IS_SET (C); break;
2521 case CC: res = IS_CLEAR (C); break;
2522 case MI: res = IS_SET (N); break;
2523 case PL: res = IS_CLEAR (N); break;
2524 case VS: res = IS_SET (V); break;
2525 case VC: res = IS_CLEAR (V); break;
2526 case HI: res = IS_SET (C) && IS_CLEAR (Z); break;
2527 case LS: res = IS_CLEAR (C) || IS_SET (Z); break;
2528 case GE: res = IS_SET (N) == IS_SET (V); break;
2529 case LT: res = IS_SET (N) != IS_SET (V); break;
2530 case GT: res = IS_CLEAR (Z) && (IS_SET (N) == IS_SET (V)); break;
2531 case LE: res = IS_SET (Z) || (IS_SET (N) != IS_SET (V)); break;
2532 case AL:
2533 case NV:
2534 default:
2535 res = 1;
2536 break;
2537 }
2538 return res;
2539 }
2540
2541 static void
2542 CondCompare (sim_cpu *cpu) /* aka: ccmp and ccmn */
2543 {
2544 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
2545 instr[30] = compare with positive (1) or negative value (0)
2546 instr[29,21] = 1 1101 0010
2547 instr[20,16] = Rm or const
2548 instr[15,12] = cond
2549 instr[11] = compare reg (0) or const (1)
2550 instr[10] = 0
2551 instr[9,5] = Rn
2552 instr[4] = 0
2553 instr[3,0] = value for CPSR bits if the comparison does not take place. */
2554 signed int negate;
2555 unsigned rm;
2556 unsigned rn;
2557
2558 NYI_assert (29, 21, 0x1d2);
2559 NYI_assert (10, 10, 0);
2560 NYI_assert (4, 4, 0);
2561
2562 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2563 if (! testConditionCode (cpu, INSTR (15, 12)))
2564 {
2565 aarch64_set_CPSR (cpu, INSTR (3, 0));
2566 return;
2567 }
2568
2569 negate = INSTR (30, 30) ? 1 : -1;
2570 rm = INSTR (20, 16);
2571 rn = INSTR ( 9, 5);
2572
2573 if (INSTR (31, 31))
2574 {
2575 if (INSTR (11, 11))
2576 set_flags_for_sub64 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK),
2577 negate * (uint64_t) rm);
2578 else
2579 set_flags_for_sub64 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK),
2580 negate * aarch64_get_reg_u64 (cpu, rm, SP_OK));
2581 }
2582 else
2583 {
2584 if (INSTR (11, 11))
2585 set_flags_for_sub32 (cpu, aarch64_get_reg_u32 (cpu, rn, SP_OK),
2586 negate * rm);
2587 else
2588 set_flags_for_sub32 (cpu, aarch64_get_reg_u32 (cpu, rn, SP_OK),
2589 negate * aarch64_get_reg_u32 (cpu, rm, SP_OK));
2590 }
2591 }
2592
2593 static void
2594 do_vec_MOV_whole_vector (sim_cpu *cpu)
2595 {
2596 /* MOV Vd.T, Vs.T (alias for ORR Vd.T, Vn.T, Vm.T where Vn == Vm)
2597
2598 instr[31] = 0
2599 instr[30] = half(0)/full(1)
2600 instr[29,21] = 001110101
2601 instr[20,16] = Vs
2602 instr[15,10] = 000111
2603 instr[9,5] = Vs
2604 instr[4,0] = Vd */
2605
2606 unsigned vs = INSTR (9, 5);
2607 unsigned vd = INSTR (4, 0);
2608
2609 NYI_assert (29, 21, 0x075);
2610 NYI_assert (15, 10, 0x07);
2611
2612 if (INSTR (20, 16) != vs)
2613 HALT_NYI;
2614
2615 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2616 if (INSTR (30, 30))
2617 aarch64_set_vec_u64 (cpu, vd, 1, aarch64_get_vec_u64 (cpu, vs, 1));
2618
2619 aarch64_set_vec_u64 (cpu, vd, 0, aarch64_get_vec_u64 (cpu, vs, 0));
2620 }
2621
2622 static void
2623 do_vec_SMOV_into_scalar (sim_cpu *cpu)
2624 {
2625 /* instr[31] = 0
2626 instr[30] = word(0)/long(1)
2627 instr[29,21] = 00 1110 000
2628 instr[20,16] = element size and index
2629 instr[15,10] = 00 0010 11
2630 instr[9,5] = V source
2631 instr[4,0] = R dest */
2632
2633 unsigned vs = INSTR (9, 5);
2634 unsigned rd = INSTR (4, 0);
2635 unsigned imm5 = INSTR (20, 16);
2636 unsigned full = INSTR (30, 30);
2637 int size, index;
2638
2639 NYI_assert (29, 21, 0x070);
2640 NYI_assert (15, 10, 0x0B);
2641
2642 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2643
2644 if (imm5 & 0x1)
2645 {
2646 size = 0;
2647 index = (imm5 >> 1) & 0xF;
2648 }
2649 else if (imm5 & 0x2)
2650 {
2651 size = 1;
2652 index = (imm5 >> 2) & 0x7;
2653 }
2654 else if (full && (imm5 & 0x4))
2655 {
2656 size = 2;
2657 index = (imm5 >> 3) & 0x3;
2658 }
2659 else
2660 HALT_UNALLOC;
2661
2662 switch (size)
2663 {
2664 case 0:
2665 if (full)
2666 aarch64_set_reg_s64 (cpu, rd, NO_SP,
2667 aarch64_get_vec_s8 (cpu, vs, index));
2668 else
2669 aarch64_set_reg_s32 (cpu, rd, NO_SP,
2670 aarch64_get_vec_s8 (cpu, vs, index));
2671 break;
2672
2673 case 1:
2674 if (full)
2675 aarch64_set_reg_s64 (cpu, rd, NO_SP,
2676 aarch64_get_vec_s16 (cpu, vs, index));
2677 else
2678 aarch64_set_reg_s32 (cpu, rd, NO_SP,
2679 aarch64_get_vec_s16 (cpu, vs, index));
2680 break;
2681
2682 case 2:
2683 aarch64_set_reg_s64 (cpu, rd, NO_SP,
2684 aarch64_get_vec_s32 (cpu, vs, index));
2685 break;
2686
2687 default:
2688 HALT_UNALLOC;
2689 }
2690 }
2691
2692 static void
2693 do_vec_UMOV_into_scalar (sim_cpu *cpu)
2694 {
2695 /* instr[31] = 0
2696 instr[30] = word(0)/long(1)
2697 instr[29,21] = 00 1110 000
2698 instr[20,16] = element size and index
2699 instr[15,10] = 00 0011 11
2700 instr[9,5] = V source
2701 instr[4,0] = R dest */
2702
2703 unsigned vs = INSTR (9, 5);
2704 unsigned rd = INSTR (4, 0);
2705 unsigned imm5 = INSTR (20, 16);
2706 unsigned full = INSTR (30, 30);
2707 int size, index;
2708
2709 NYI_assert (29, 21, 0x070);
2710 NYI_assert (15, 10, 0x0F);
2711
2712 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2713
2714 if (!full)
2715 {
2716 if (imm5 & 0x1)
2717 {
2718 size = 0;
2719 index = (imm5 >> 1) & 0xF;
2720 }
2721 else if (imm5 & 0x2)
2722 {
2723 size = 1;
2724 index = (imm5 >> 2) & 0x7;
2725 }
2726 else if (imm5 & 0x4)
2727 {
2728 size = 2;
2729 index = (imm5 >> 3) & 0x3;
2730 }
2731 else
2732 HALT_UNALLOC;
2733 }
2734 else if (imm5 & 0x8)
2735 {
2736 size = 3;
2737 index = (imm5 >> 4) & 0x1;
2738 }
2739 else
2740 HALT_UNALLOC;
2741
2742 switch (size)
2743 {
2744 case 0:
2745 aarch64_set_reg_u32 (cpu, rd, NO_SP,
2746 aarch64_get_vec_u8 (cpu, vs, index));
2747 break;
2748
2749 case 1:
2750 aarch64_set_reg_u32 (cpu, rd, NO_SP,
2751 aarch64_get_vec_u16 (cpu, vs, index));
2752 break;
2753
2754 case 2:
2755 aarch64_set_reg_u32 (cpu, rd, NO_SP,
2756 aarch64_get_vec_u32 (cpu, vs, index));
2757 break;
2758
2759 case 3:
2760 aarch64_set_reg_u64 (cpu, rd, NO_SP,
2761 aarch64_get_vec_u64 (cpu, vs, index));
2762 break;
2763
2764 default:
2765 HALT_UNALLOC;
2766 }
2767 }
2768
2769 static void
2770 do_vec_INS (sim_cpu *cpu)
2771 {
2772 /* instr[31,21] = 01001110000
2773 instr[20,16] = element size and index
2774 instr[15,10] = 000111
2775 instr[9,5] = W source
2776 instr[4,0] = V dest */
2777
2778 int index;
2779 unsigned rs = INSTR (9, 5);
2780 unsigned vd = INSTR (4, 0);
2781
2782 NYI_assert (31, 21, 0x270);
2783 NYI_assert (15, 10, 0x07);
2784
2785 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2786 if (INSTR (16, 16))
2787 {
2788 index = INSTR (20, 17);
2789 aarch64_set_vec_u8 (cpu, vd, index,
2790 aarch64_get_reg_u8 (cpu, rs, NO_SP));
2791 }
2792 else if (INSTR (17, 17))
2793 {
2794 index = INSTR (20, 18);
2795 aarch64_set_vec_u16 (cpu, vd, index,
2796 aarch64_get_reg_u16 (cpu, rs, NO_SP));
2797 }
2798 else if (INSTR (18, 18))
2799 {
2800 index = INSTR (20, 19);
2801 aarch64_set_vec_u32 (cpu, vd, index,
2802 aarch64_get_reg_u32 (cpu, rs, NO_SP));
2803 }
2804 else if (INSTR (19, 19))
2805 {
2806 index = INSTR (20, 20);
2807 aarch64_set_vec_u64 (cpu, vd, index,
2808 aarch64_get_reg_u64 (cpu, rs, NO_SP));
2809 }
2810 else
2811 HALT_NYI;
2812 }
2813
2814 static void
2815 do_vec_DUP_vector_into_vector (sim_cpu *cpu)
2816 {
2817 /* instr[31] = 0
2818 instr[30] = half(0)/full(1)
2819 instr[29,21] = 00 1110 000
2820 instr[20,16] = element size and index
2821 instr[15,10] = 0000 01
2822 instr[9,5] = V source
2823 instr[4,0] = V dest. */
2824
2825 unsigned full = INSTR (30, 30);
2826 unsigned vs = INSTR (9, 5);
2827 unsigned vd = INSTR (4, 0);
2828 int i, index;
2829
2830 NYI_assert (29, 21, 0x070);
2831 NYI_assert (15, 10, 0x01);
2832
2833 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2834 if (INSTR (16, 16))
2835 {
2836 index = INSTR (20, 17);
2837
2838 for (i = 0; i < (full ? 16 : 8); i++)
2839 aarch64_set_vec_u8 (cpu, vd, i, aarch64_get_vec_u8 (cpu, vs, index));
2840 }
2841 else if (INSTR (17, 17))
2842 {
2843 index = INSTR (20, 18);
2844
2845 for (i = 0; i < (full ? 8 : 4); i++)
2846 aarch64_set_vec_u16 (cpu, vd, i, aarch64_get_vec_u16 (cpu, vs, index));
2847 }
2848 else if (INSTR (18, 18))
2849 {
2850 index = INSTR (20, 19);
2851
2852 for (i = 0; i < (full ? 4 : 2); i++)
2853 aarch64_set_vec_u32 (cpu, vd, i, aarch64_get_vec_u32 (cpu, vs, index));
2854 }
2855 else
2856 {
2857 if (INSTR (19, 19) == 0)
2858 HALT_UNALLOC;
2859
2860 if (! full)
2861 HALT_UNALLOC;
2862
2863 index = INSTR (20, 20);
2864
2865 for (i = 0; i < 2; i++)
2866 aarch64_set_vec_u64 (cpu, vd, i, aarch64_get_vec_u64 (cpu, vs, index));
2867 }
2868 }
2869
2870 static void
2871 do_vec_TBL (sim_cpu *cpu)
2872 {
2873 /* instr[31] = 0
2874 instr[30] = half(0)/full(1)
2875 instr[29,21] = 00 1110 000
2876 instr[20,16] = Vm
2877 instr[15] = 0
2878 instr[14,13] = vec length
2879 instr[12,10] = 000
2880 instr[9,5] = V start
2881 instr[4,0] = V dest */
2882
2883 int full = INSTR (30, 30);
2884 int len = INSTR (14, 13) + 1;
2885 unsigned vm = INSTR (20, 16);
2886 unsigned vn = INSTR (9, 5);
2887 unsigned vd = INSTR (4, 0);
2888 unsigned i;
2889
2890 NYI_assert (29, 21, 0x070);
2891 NYI_assert (12, 10, 0);
2892
2893 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2894 for (i = 0; i < (full ? 16 : 8); i++)
2895 {
2896 unsigned int selector = aarch64_get_vec_u8 (cpu, vm, i);
2897 uint8_t val;
2898
2899 if (selector < 16)
2900 val = aarch64_get_vec_u8 (cpu, vn, selector);
2901 else if (selector < 32)
2902 val = len < 2 ? 0 : aarch64_get_vec_u8 (cpu, vn + 1, selector - 16);
2903 else if (selector < 48)
2904 val = len < 3 ? 0 : aarch64_get_vec_u8 (cpu, vn + 2, selector - 32);
2905 else if (selector < 64)
2906 val = len < 4 ? 0 : aarch64_get_vec_u8 (cpu, vn + 3, selector - 48);
2907 else
2908 val = 0;
2909
2910 aarch64_set_vec_u8 (cpu, vd, i, val);
2911 }
2912 }
2913
2914 static void
2915 do_vec_TRN (sim_cpu *cpu)
2916 {
2917 /* instr[31] = 0
2918 instr[30] = half(0)/full(1)
2919 instr[29,24] = 00 1110
2920 instr[23,22] = size
2921 instr[21] = 0
2922 instr[20,16] = Vm
2923 instr[15] = 0
2924 instr[14] = TRN1 (0) / TRN2 (1)
2925 instr[13,10] = 1010
2926 instr[9,5] = V source
2927 instr[4,0] = V dest. */
2928
2929 int full = INSTR (30, 30);
2930 int second = INSTR (14, 14);
2931 unsigned vm = INSTR (20, 16);
2932 unsigned vn = INSTR (9, 5);
2933 unsigned vd = INSTR (4, 0);
2934 unsigned i;
2935
2936 NYI_assert (29, 24, 0x0E);
2937 NYI_assert (13, 10, 0xA);
2938
2939 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
2940 switch (INSTR (23, 22))
2941 {
2942 case 0:
2943 for (i = 0; i < (full ? 8 : 4); i++)
2944 {
2945 aarch64_set_vec_u8
2946 (cpu, vd, i * 2,
2947 aarch64_get_vec_u8 (cpu, second ? vm : vn, i * 2));
2948 aarch64_set_vec_u8
2949 (cpu, vd, 1 * 2 + 1,
2950 aarch64_get_vec_u8 (cpu, second ? vn : vm, i * 2 + 1));
2951 }
2952 break;
2953
2954 case 1:
2955 for (i = 0; i < (full ? 4 : 2); i++)
2956 {
2957 aarch64_set_vec_u16
2958 (cpu, vd, i * 2,
2959 aarch64_get_vec_u16 (cpu, second ? vm : vn, i * 2));
2960 aarch64_set_vec_u16
2961 (cpu, vd, 1 * 2 + 1,
2962 aarch64_get_vec_u16 (cpu, second ? vn : vm, i * 2 + 1));
2963 }
2964 break;
2965
2966 case 2:
2967 aarch64_set_vec_u32
2968 (cpu, vd, 0, aarch64_get_vec_u32 (cpu, second ? vm : vn, 0));
2969 aarch64_set_vec_u32
2970 (cpu, vd, 1, aarch64_get_vec_u32 (cpu, second ? vn : vm, 1));
2971 aarch64_set_vec_u32
2972 (cpu, vd, 2, aarch64_get_vec_u32 (cpu, second ? vm : vn, 2));
2973 aarch64_set_vec_u32
2974 (cpu, vd, 3, aarch64_get_vec_u32 (cpu, second ? vn : vm, 3));
2975 break;
2976
2977 case 3:
2978 if (! full)
2979 HALT_UNALLOC;
2980
2981 aarch64_set_vec_u64 (cpu, vd, 0,
2982 aarch64_get_vec_u64 (cpu, second ? vm : vn, 0));
2983 aarch64_set_vec_u64 (cpu, vd, 1,
2984 aarch64_get_vec_u64 (cpu, second ? vn : vm, 1));
2985 break;
2986 }
2987 }
2988
2989 static void
2990 do_vec_DUP_scalar_into_vector (sim_cpu *cpu)
2991 {
2992 /* instr[31] = 0
2993 instr[30] = 0=> zero top 64-bits, 1=> duplicate into top 64-bits
2994 [must be 1 for 64-bit xfer]
2995 instr[29,20] = 00 1110 0000
2996 instr[19,16] = element size: 0001=> 8-bits, 0010=> 16-bits,
2997 0100=> 32-bits. 1000=>64-bits
2998 instr[15,10] = 0000 11
2999 instr[9,5] = W source
3000 instr[4,0] = V dest. */
3001
3002 unsigned i;
3003 unsigned Vd = INSTR (4, 0);
3004 unsigned Rs = INSTR (9, 5);
3005 int both = INSTR (30, 30);
3006
3007 NYI_assert (29, 20, 0x0E0);
3008 NYI_assert (15, 10, 0x03);
3009
3010 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3011 switch (INSTR (19, 16))
3012 {
3013 case 1:
3014 for (i = 0; i < (both ? 16 : 8); i++)
3015 aarch64_set_vec_u8 (cpu, Vd, i, aarch64_get_reg_u8 (cpu, Rs, NO_SP));
3016 break;
3017
3018 case 2:
3019 for (i = 0; i < (both ? 8 : 4); i++)
3020 aarch64_set_vec_u16 (cpu, Vd, i, aarch64_get_reg_u16 (cpu, Rs, NO_SP));
3021 break;
3022
3023 case 4:
3024 for (i = 0; i < (both ? 4 : 2); i++)
3025 aarch64_set_vec_u32 (cpu, Vd, i, aarch64_get_reg_u32 (cpu, Rs, NO_SP));
3026 break;
3027
3028 case 8:
3029 if (!both)
3030 HALT_NYI;
3031 aarch64_set_vec_u64 (cpu, Vd, 0, aarch64_get_reg_u64 (cpu, Rs, NO_SP));
3032 aarch64_set_vec_u64 (cpu, Vd, 1, aarch64_get_reg_u64 (cpu, Rs, NO_SP));
3033 break;
3034
3035 default:
3036 HALT_NYI;
3037 }
3038 }
3039
3040 static void
3041 do_vec_UZP (sim_cpu *cpu)
3042 {
3043 /* instr[31] = 0
3044 instr[30] = half(0)/full(1)
3045 instr[29,24] = 00 1110
3046 instr[23,22] = size: byte(00), half(01), word (10), long (11)
3047 instr[21] = 0
3048 instr[20,16] = Vm
3049 instr[15] = 0
3050 instr[14] = lower (0) / upper (1)
3051 instr[13,10] = 0110
3052 instr[9,5] = Vn
3053 instr[4,0] = Vd. */
3054
3055 int full = INSTR (30, 30);
3056 int upper = INSTR (14, 14);
3057
3058 unsigned vm = INSTR (20, 16);
3059 unsigned vn = INSTR (9, 5);
3060 unsigned vd = INSTR (4, 0);
3061
3062 uint64_t val_m1 = aarch64_get_vec_u64 (cpu, vm, 0);
3063 uint64_t val_m2 = aarch64_get_vec_u64 (cpu, vm, 1);
3064 uint64_t val_n1 = aarch64_get_vec_u64 (cpu, vn, 0);
3065 uint64_t val_n2 = aarch64_get_vec_u64 (cpu, vn, 1);
3066
3067 uint64_t val1;
3068 uint64_t val2;
3069
3070 uint64_t input2 = full ? val_n2 : val_m1;
3071
3072 NYI_assert (29, 24, 0x0E);
3073 NYI_assert (21, 21, 0);
3074 NYI_assert (15, 15, 0);
3075 NYI_assert (13, 10, 6);
3076
3077 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3078 switch (INSTR (23, 22))
3079 {
3080 case 0:
3081 val1 = (val_n1 >> (upper * 8)) & 0xFFULL;
3082 val1 |= (val_n1 >> ((upper * 8) + 8)) & 0xFF00ULL;
3083 val1 |= (val_n1 >> ((upper * 8) + 16)) & 0xFF0000ULL;
3084 val1 |= (val_n1 >> ((upper * 8) + 24)) & 0xFF000000ULL;
3085
3086 val1 |= (input2 << (32 - (upper * 8))) & 0xFF00000000ULL;
3087 val1 |= (input2 << (24 - (upper * 8))) & 0xFF0000000000ULL;
3088 val1 |= (input2 << (16 - (upper * 8))) & 0xFF000000000000ULL;
3089 val1 |= (input2 << (8 - (upper * 8))) & 0xFF00000000000000ULL;
3090
3091 if (full)
3092 {
3093 val2 = (val_m1 >> (upper * 8)) & 0xFFULL;
3094 val2 |= (val_m1 >> ((upper * 8) + 8)) & 0xFF00ULL;
3095 val2 |= (val_m1 >> ((upper * 8) + 16)) & 0xFF0000ULL;
3096 val2 |= (val_m1 >> ((upper * 8) + 24)) & 0xFF000000ULL;
3097
3098 val2 |= (val_m2 << (32 - (upper * 8))) & 0xFF00000000ULL;
3099 val2 |= (val_m2 << (24 - (upper * 8))) & 0xFF0000000000ULL;
3100 val2 |= (val_m2 << (16 - (upper * 8))) & 0xFF000000000000ULL;
3101 val2 |= (val_m2 << (8 - (upper * 8))) & 0xFF00000000000000ULL;
3102 }
3103 break;
3104
3105 case 1:
3106 val1 = (val_n1 >> (upper * 16)) & 0xFFFFULL;
3107 val1 |= (val_n1 >> ((upper * 16) + 16)) & 0xFFFF0000ULL;
3108
3109 val1 |= (input2 << (32 - (upper * 16))) & 0xFFFF00000000ULL;;
3110 val1 |= (input2 << (16 - (upper * 16))) & 0xFFFF000000000000ULL;
3111
3112 if (full)
3113 {
3114 val2 = (val_m1 >> (upper * 16)) & 0xFFFFULL;
3115 val2 |= (val_m1 >> ((upper * 16) + 16)) & 0xFFFF0000ULL;
3116
3117 val2 |= (val_m2 << (32 - (upper * 16))) & 0xFFFF00000000ULL;
3118 val2 |= (val_m2 << (16 - (upper * 16))) & 0xFFFF000000000000ULL;
3119 }
3120 break;
3121
3122 case 2:
3123 val1 = (val_n1 >> (upper * 32)) & 0xFFFFFFFF;
3124 val1 |= (input2 << (32 - (upper * 32))) & 0xFFFFFFFF00000000ULL;
3125
3126 if (full)
3127 {
3128 val2 = (val_m1 >> (upper * 32)) & 0xFFFFFFFF;
3129 val2 |= (val_m2 << (32 - (upper * 32))) & 0xFFFFFFFF00000000ULL;
3130 }
3131 break;
3132
3133 case 3:
3134 if (! full)
3135 HALT_UNALLOC;
3136
3137 val1 = upper ? val_n2 : val_n1;
3138 val2 = upper ? val_m2 : val_m1;
3139 break;
3140 }
3141
3142 aarch64_set_vec_u64 (cpu, vd, 0, val1);
3143 if (full)
3144 aarch64_set_vec_u64 (cpu, vd, 1, val2);
3145 }
3146
3147 static void
3148 do_vec_ZIP (sim_cpu *cpu)
3149 {
3150 /* instr[31] = 0
3151 instr[30] = half(0)/full(1)
3152 instr[29,24] = 00 1110
3153 instr[23,22] = size: byte(00), hald(01), word (10), long (11)
3154 instr[21] = 0
3155 instr[20,16] = Vm
3156 instr[15] = 0
3157 instr[14] = lower (0) / upper (1)
3158 instr[13,10] = 1110
3159 instr[9,5] = Vn
3160 instr[4,0] = Vd. */
3161
3162 int full = INSTR (30, 30);
3163 int upper = INSTR (14, 14);
3164
3165 unsigned vm = INSTR (20, 16);
3166 unsigned vn = INSTR (9, 5);
3167 unsigned vd = INSTR (4, 0);
3168
3169 uint64_t val_m1 = aarch64_get_vec_u64 (cpu, vm, 0);
3170 uint64_t val_m2 = aarch64_get_vec_u64 (cpu, vm, 1);
3171 uint64_t val_n1 = aarch64_get_vec_u64 (cpu, vn, 0);
3172 uint64_t val_n2 = aarch64_get_vec_u64 (cpu, vn, 1);
3173
3174 uint64_t val1 = 0;
3175 uint64_t val2 = 0;
3176
3177 uint64_t input1 = upper ? val_n1 : val_m1;
3178 uint64_t input2 = upper ? val_n2 : val_m2;
3179
3180 NYI_assert (29, 24, 0x0E);
3181 NYI_assert (21, 21, 0);
3182 NYI_assert (15, 15, 0);
3183 NYI_assert (13, 10, 0xE);
3184
3185 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3186 switch (INSTR (23, 23))
3187 {
3188 case 0:
3189 val1 =
3190 ((input1 << 0) & (0xFF << 0))
3191 | ((input2 << 8) & (0xFF << 8))
3192 | ((input1 << 8) & (0xFF << 16))
3193 | ((input2 << 16) & (0xFF << 24))
3194 | ((input1 << 16) & (0xFFULL << 32))
3195 | ((input2 << 24) & (0xFFULL << 40))
3196 | ((input1 << 24) & (0xFFULL << 48))
3197 | ((input2 << 32) & (0xFFULL << 56));
3198
3199 val2 =
3200 ((input1 >> 32) & (0xFF << 0))
3201 | ((input2 >> 24) & (0xFF << 8))
3202 | ((input1 >> 24) & (0xFF << 16))
3203 | ((input2 >> 16) & (0xFF << 24))
3204 | ((input1 >> 16) & (0xFFULL << 32))
3205 | ((input2 >> 8) & (0xFFULL << 40))
3206 | ((input1 >> 8) & (0xFFULL << 48))
3207 | ((input2 >> 0) & (0xFFULL << 56));
3208 break;
3209
3210 case 1:
3211 val1 =
3212 ((input1 << 0) & (0xFFFF << 0))
3213 | ((input2 << 16) & (0xFFFF << 16))
3214 | ((input1 << 16) & (0xFFFFULL << 32))
3215 | ((input2 << 32) & (0xFFFFULL << 48));
3216
3217 val2 =
3218 ((input1 >> 32) & (0xFFFF << 0))
3219 | ((input2 >> 16) & (0xFFFF << 16))
3220 | ((input1 >> 16) & (0xFFFFULL << 32))
3221 | ((input2 >> 0) & (0xFFFFULL << 48));
3222 break;
3223
3224 case 2:
3225 val1 = (input1 & 0xFFFFFFFFULL) | (input2 << 32);
3226 val2 = (input2 & 0xFFFFFFFFULL) | (input1 << 32);
3227 break;
3228
3229 case 3:
3230 val1 = input1;
3231 val2 = input2;
3232 break;
3233 }
3234
3235 aarch64_set_vec_u64 (cpu, vd, 0, val1);
3236 if (full)
3237 aarch64_set_vec_u64 (cpu, vd, 1, val2);
3238 }
3239
3240 /* Floating point immediates are encoded in 8 bits.
3241 fpimm[7] = sign bit.
3242 fpimm[6:4] = signed exponent.
3243 fpimm[3:0] = fraction (assuming leading 1).
3244 i.e. F = s * 1.f * 2^(e - b). */
3245
3246 static float
3247 fp_immediate_for_encoding_32 (uint32_t imm8)
3248 {
3249 float u;
3250 uint32_t s, e, f, i;
3251
3252 s = (imm8 >> 7) & 0x1;
3253 e = (imm8 >> 4) & 0x7;
3254 f = imm8 & 0xf;
3255
3256 /* The fp value is s * n/16 * 2r where n is 16+e. */
3257 u = (16.0 + f) / 16.0;
3258
3259 /* N.B. exponent is signed. */
3260 if (e < 4)
3261 {
3262 int epos = e;
3263
3264 for (i = 0; i <= epos; i++)
3265 u *= 2.0;
3266 }
3267 else
3268 {
3269 int eneg = 7 - e;
3270
3271 for (i = 0; i < eneg; i++)
3272 u /= 2.0;
3273 }
3274
3275 if (s)
3276 u = - u;
3277
3278 return u;
3279 }
3280
3281 static double
3282 fp_immediate_for_encoding_64 (uint32_t imm8)
3283 {
3284 double u;
3285 uint32_t s, e, f, i;
3286
3287 s = (imm8 >> 7) & 0x1;
3288 e = (imm8 >> 4) & 0x7;
3289 f = imm8 & 0xf;
3290
3291 /* The fp value is s * n/16 * 2r where n is 16+e. */
3292 u = (16.0 + f) / 16.0;
3293
3294 /* N.B. exponent is signed. */
3295 if (e < 4)
3296 {
3297 int epos = e;
3298
3299 for (i = 0; i <= epos; i++)
3300 u *= 2.0;
3301 }
3302 else
3303 {
3304 int eneg = 7 - e;
3305
3306 for (i = 0; i < eneg; i++)
3307 u /= 2.0;
3308 }
3309
3310 if (s)
3311 u = - u;
3312
3313 return u;
3314 }
3315
3316 static void
3317 do_vec_MOV_immediate (sim_cpu *cpu)
3318 {
3319 /* instr[31] = 0
3320 instr[30] = full/half selector
3321 instr[29,19] = 00111100000
3322 instr[18,16] = high 3 bits of uimm8
3323 instr[15,12] = size & shift:
3324 0000 => 32-bit
3325 0010 => 32-bit + LSL#8
3326 0100 => 32-bit + LSL#16
3327 0110 => 32-bit + LSL#24
3328 1010 => 16-bit + LSL#8
3329 1000 => 16-bit
3330 1101 => 32-bit + MSL#16
3331 1100 => 32-bit + MSL#8
3332 1110 => 8-bit
3333 1111 => double
3334 instr[11,10] = 01
3335 instr[9,5] = low 5-bits of uimm8
3336 instr[4,0] = Vd. */
3337
3338 int full = INSTR (30, 30);
3339 unsigned vd = INSTR (4, 0);
3340 unsigned val = (INSTR (18, 16) << 5) | INSTR (9, 5);
3341 unsigned i;
3342
3343 NYI_assert (29, 19, 0x1E0);
3344 NYI_assert (11, 10, 1);
3345
3346 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3347 switch (INSTR (15, 12))
3348 {
3349 case 0x0: /* 32-bit, no shift. */
3350 case 0x2: /* 32-bit, shift by 8. */
3351 case 0x4: /* 32-bit, shift by 16. */
3352 case 0x6: /* 32-bit, shift by 24. */
3353 val <<= (8 * INSTR (14, 13));
3354 for (i = 0; i < (full ? 4 : 2); i++)
3355 aarch64_set_vec_u32 (cpu, vd, i, val);
3356 break;
3357
3358 case 0xa: /* 16-bit, shift by 8. */
3359 val <<= 8;
3360 /* Fall through. */
3361 case 0x8: /* 16-bit, no shift. */
3362 for (i = 0; i < (full ? 8 : 4); i++)
3363 aarch64_set_vec_u16 (cpu, vd, i, val);
3364 break;
3365
3366 case 0xd: /* 32-bit, mask shift by 16. */
3367 val <<= 8;
3368 val |= 0xFF;
3369 /* Fall through. */
3370 case 0xc: /* 32-bit, mask shift by 8. */
3371 val <<= 8;
3372 val |= 0xFF;
3373 for (i = 0; i < (full ? 4 : 2); i++)
3374 aarch64_set_vec_u32 (cpu, vd, i, val);
3375 break;
3376
3377 case 0xe: /* 8-bit, no shift. */
3378 for (i = 0; i < (full ? 16 : 8); i++)
3379 aarch64_set_vec_u8 (cpu, vd, i, val);
3380 break;
3381
3382 case 0xf: /* FMOV Vs.{2|4}S, #fpimm. */
3383 {
3384 float u = fp_immediate_for_encoding_32 (val);
3385 for (i = 0; i < (full ? 4 : 2); i++)
3386 aarch64_set_vec_float (cpu, vd, i, u);
3387 break;
3388 }
3389
3390 default:
3391 HALT_NYI;
3392 }
3393 }
3394
3395 static void
3396 do_vec_MVNI (sim_cpu *cpu)
3397 {
3398 /* instr[31] = 0
3399 instr[30] = full/half selector
3400 instr[29,19] = 10111100000
3401 instr[18,16] = high 3 bits of uimm8
3402 instr[15,12] = selector
3403 instr[11,10] = 01
3404 instr[9,5] = low 5-bits of uimm8
3405 instr[4,0] = Vd. */
3406
3407 int full = INSTR (30, 30);
3408 unsigned vd = INSTR (4, 0);
3409 unsigned val = (INSTR (18, 16) << 5) | INSTR (9, 5);
3410 unsigned i;
3411
3412 NYI_assert (29, 19, 0x5E0);
3413 NYI_assert (11, 10, 1);
3414
3415 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3416 switch (INSTR (15, 12))
3417 {
3418 case 0x0: /* 32-bit, no shift. */
3419 case 0x2: /* 32-bit, shift by 8. */
3420 case 0x4: /* 32-bit, shift by 16. */
3421 case 0x6: /* 32-bit, shift by 24. */
3422 val <<= (8 * INSTR (14, 13));
3423 val = ~ val;
3424 for (i = 0; i < (full ? 4 : 2); i++)
3425 aarch64_set_vec_u32 (cpu, vd, i, val);
3426 return;
3427
3428 case 0xa: /* 16-bit, 8 bit shift. */
3429 val <<= 8;
3430 case 0x8: /* 16-bit, no shift. */
3431 val = ~ val;
3432 for (i = 0; i < (full ? 8 : 4); i++)
3433 aarch64_set_vec_u16 (cpu, vd, i, val);
3434 return;
3435
3436 case 0xd: /* 32-bit, mask shift by 16. */
3437 val <<= 8;
3438 val |= 0xFF;
3439 case 0xc: /* 32-bit, mask shift by 8. */
3440 val <<= 8;
3441 val |= 0xFF;
3442 val = ~ val;
3443 for (i = 0; i < (full ? 4 : 2); i++)
3444 aarch64_set_vec_u32 (cpu, vd, i, val);
3445 return;
3446
3447 case 0xE: /* MOVI Dn, #mask64 */
3448 {
3449 uint64_t mask = 0;
3450
3451 for (i = 0; i < 8; i++)
3452 if (val & (1 << i))
3453 mask |= (0xFFUL << (i * 8));
3454 aarch64_set_vec_u64 (cpu, vd, 0, mask);
3455 aarch64_set_vec_u64 (cpu, vd, 1, mask);
3456 return;
3457 }
3458
3459 case 0xf: /* FMOV Vd.2D, #fpimm. */
3460 {
3461 double u = fp_immediate_for_encoding_64 (val);
3462
3463 if (! full)
3464 HALT_UNALLOC;
3465
3466 aarch64_set_vec_double (cpu, vd, 0, u);
3467 aarch64_set_vec_double (cpu, vd, 1, u);
3468 return;
3469 }
3470
3471 default:
3472 HALT_NYI;
3473 }
3474 }
3475
3476 #define ABS(A) ((A) < 0 ? - (A) : (A))
3477
3478 static void
3479 do_vec_ABS (sim_cpu *cpu)
3480 {
3481 /* instr[31] = 0
3482 instr[30] = half(0)/full(1)
3483 instr[29,24] = 00 1110
3484 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit, 11=> 64-bit
3485 instr[21,10] = 10 0000 1011 10
3486 instr[9,5] = Vn
3487 instr[4.0] = Vd. */
3488
3489 unsigned vn = INSTR (9, 5);
3490 unsigned vd = INSTR (4, 0);
3491 unsigned full = INSTR (30, 30);
3492 unsigned i;
3493
3494 NYI_assert (29, 24, 0x0E);
3495 NYI_assert (21, 10, 0x82E);
3496
3497 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3498 switch (INSTR (23, 22))
3499 {
3500 case 0:
3501 for (i = 0; i < (full ? 16 : 8); i++)
3502 aarch64_set_vec_s8 (cpu, vd, i,
3503 ABS (aarch64_get_vec_s8 (cpu, vn, i)));
3504 break;
3505
3506 case 1:
3507 for (i = 0; i < (full ? 8 : 4); i++)
3508 aarch64_set_vec_s16 (cpu, vd, i,
3509 ABS (aarch64_get_vec_s16 (cpu, vn, i)));
3510 break;
3511
3512 case 2:
3513 for (i = 0; i < (full ? 4 : 2); i++)
3514 aarch64_set_vec_s32 (cpu, vd, i,
3515 ABS (aarch64_get_vec_s32 (cpu, vn, i)));
3516 break;
3517
3518 case 3:
3519 if (! full)
3520 HALT_NYI;
3521 for (i = 0; i < 2; i++)
3522 aarch64_set_vec_s64 (cpu, vd, i,
3523 ABS (aarch64_get_vec_s64 (cpu, vn, i)));
3524 break;
3525 }
3526 }
3527
3528 static void
3529 do_vec_ADDV (sim_cpu *cpu)
3530 {
3531 /* instr[31] = 0
3532 instr[30] = full/half selector
3533 instr[29,24] = 00 1110
3534 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit, 11=> 64-bit
3535 instr[21,10] = 11 0001 1011 10
3536 instr[9,5] = Vm
3537 instr[4.0] = Rd. */
3538
3539 unsigned vm = INSTR (9, 5);
3540 unsigned rd = INSTR (4, 0);
3541 unsigned i;
3542 int full = INSTR (30, 30);
3543
3544 NYI_assert (29, 24, 0x0E);
3545 NYI_assert (21, 10, 0xC6E);
3546
3547 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3548 switch (INSTR (23, 22))
3549 {
3550 case 0:
3551 {
3552 uint8_t val = 0;
3553 for (i = 0; i < (full ? 16 : 8); i++)
3554 val += aarch64_get_vec_u8 (cpu, vm, i);
3555 aarch64_set_vec_u64 (cpu, rd, 0, val);
3556 return;
3557 }
3558
3559 case 1:
3560 {
3561 uint16_t val = 0;
3562 for (i = 0; i < (full ? 8 : 4); i++)
3563 val += aarch64_get_vec_u16 (cpu, vm, i);
3564 aarch64_set_vec_u64 (cpu, rd, 0, val);
3565 return;
3566 }
3567
3568 case 2:
3569 {
3570 uint32_t val = 0;
3571 if (! full)
3572 HALT_UNALLOC;
3573 for (i = 0; i < 4; i++)
3574 val += aarch64_get_vec_u32 (cpu, vm, i);
3575 aarch64_set_vec_u64 (cpu, rd, 0, val);
3576 return;
3577 }
3578
3579 case 3:
3580 HALT_UNALLOC;
3581 }
3582 }
3583
3584 static void
3585 do_vec_ins_2 (sim_cpu *cpu)
3586 {
3587 /* instr[31,21] = 01001110000
3588 instr[20,18] = size & element selector
3589 instr[17,14] = 0000
3590 instr[13] = direction: to vec(0), from vec (1)
3591 instr[12,10] = 111
3592 instr[9,5] = Vm
3593 instr[4,0] = Vd. */
3594
3595 unsigned elem;
3596 unsigned vm = INSTR (9, 5);
3597 unsigned vd = INSTR (4, 0);
3598
3599 NYI_assert (31, 21, 0x270);
3600 NYI_assert (17, 14, 0);
3601 NYI_assert (12, 10, 7);
3602
3603 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3604 if (INSTR (13, 13) == 1)
3605 {
3606 if (INSTR (18, 18) == 1)
3607 {
3608 /* 32-bit moves. */
3609 elem = INSTR (20, 19);
3610 aarch64_set_reg_u64 (cpu, vd, NO_SP,
3611 aarch64_get_vec_u32 (cpu, vm, elem));
3612 }
3613 else
3614 {
3615 /* 64-bit moves. */
3616 if (INSTR (19, 19) != 1)
3617 HALT_NYI;
3618
3619 elem = INSTR (20, 20);
3620 aarch64_set_reg_u64 (cpu, vd, NO_SP,
3621 aarch64_get_vec_u64 (cpu, vm, elem));
3622 }
3623 }
3624 else
3625 {
3626 if (INSTR (18, 18) == 1)
3627 {
3628 /* 32-bit moves. */
3629 elem = INSTR (20, 19);
3630 aarch64_set_vec_u32 (cpu, vd, elem,
3631 aarch64_get_reg_u32 (cpu, vm, NO_SP));
3632 }
3633 else
3634 {
3635 /* 64-bit moves. */
3636 if (INSTR (19, 19) != 1)
3637 HALT_NYI;
3638
3639 elem = INSTR (20, 20);
3640 aarch64_set_vec_u64 (cpu, vd, elem,
3641 aarch64_get_reg_u64 (cpu, vm, NO_SP));
3642 }
3643 }
3644 }
3645
3646 #define DO_VEC_WIDENING_MUL(N, DST_TYPE, READ_TYPE, WRITE_TYPE) \
3647 do \
3648 { \
3649 DST_TYPE a[N], b[N]; \
3650 \
3651 for (i = 0; i < (N); i++) \
3652 { \
3653 a[i] = aarch64_get_vec_##READ_TYPE (cpu, vn, i + bias); \
3654 b[i] = aarch64_get_vec_##READ_TYPE (cpu, vm, i + bias); \
3655 } \
3656 for (i = 0; i < (N); i++) \
3657 aarch64_set_vec_##WRITE_TYPE (cpu, vd, i, a[i] * b[i]); \
3658 } \
3659 while (0)
3660
3661 static void
3662 do_vec_mull (sim_cpu *cpu)
3663 {
3664 /* instr[31] = 0
3665 instr[30] = lower(0)/upper(1) selector
3666 instr[29] = signed(0)/unsigned(1)
3667 instr[28,24] = 0 1110
3668 instr[23,22] = size: 8-bit (00), 16-bit (01), 32-bit (10)
3669 instr[21] = 1
3670 instr[20,16] = Vm
3671 instr[15,10] = 11 0000
3672 instr[9,5] = Vn
3673 instr[4.0] = Vd. */
3674
3675 int unsign = INSTR (29, 29);
3676 int bias = INSTR (30, 30);
3677 unsigned vm = INSTR (20, 16);
3678 unsigned vn = INSTR ( 9, 5);
3679 unsigned vd = INSTR ( 4, 0);
3680 unsigned i;
3681
3682 NYI_assert (28, 24, 0x0E);
3683 NYI_assert (15, 10, 0x30);
3684
3685 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3686 /* NB: Read source values before writing results, in case
3687 the source and destination vectors are the same. */
3688 switch (INSTR (23, 22))
3689 {
3690 case 0:
3691 if (bias)
3692 bias = 8;
3693 if (unsign)
3694 DO_VEC_WIDENING_MUL (8, uint16_t, u8, u16);
3695 else
3696 DO_VEC_WIDENING_MUL (8, int16_t, s8, s16);
3697 return;
3698
3699 case 1:
3700 if (bias)
3701 bias = 4;
3702 if (unsign)
3703 DO_VEC_WIDENING_MUL (4, uint32_t, u16, u32);
3704 else
3705 DO_VEC_WIDENING_MUL (4, int32_t, s16, s32);
3706 return;
3707
3708 case 2:
3709 if (bias)
3710 bias = 2;
3711 if (unsign)
3712 DO_VEC_WIDENING_MUL (2, uint64_t, u32, u64);
3713 else
3714 DO_VEC_WIDENING_MUL (2, int64_t, s32, s64);
3715 return;
3716
3717 case 3:
3718 HALT_NYI;
3719 }
3720 }
3721
3722 static void
3723 do_vec_fadd (sim_cpu *cpu)
3724 {
3725 /* instr[31] = 0
3726 instr[30] = half(0)/full(1)
3727 instr[29,24] = 001110
3728 instr[23] = FADD(0)/FSUB(1)
3729 instr[22] = float (0)/double(1)
3730 instr[21] = 1
3731 instr[20,16] = Vm
3732 instr[15,10] = 110101
3733 instr[9,5] = Vn
3734 instr[4.0] = Vd. */
3735
3736 unsigned vm = INSTR (20, 16);
3737 unsigned vn = INSTR (9, 5);
3738 unsigned vd = INSTR (4, 0);
3739 unsigned i;
3740 int full = INSTR (30, 30);
3741
3742 NYI_assert (29, 24, 0x0E);
3743 NYI_assert (21, 21, 1);
3744 NYI_assert (15, 10, 0x35);
3745
3746 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3747 if (INSTR (23, 23))
3748 {
3749 if (INSTR (22, 22))
3750 {
3751 if (! full)
3752 HALT_NYI;
3753
3754 for (i = 0; i < 2; i++)
3755 aarch64_set_vec_double (cpu, vd, i,
3756 aarch64_get_vec_double (cpu, vn, i)
3757 - aarch64_get_vec_double (cpu, vm, i));
3758 }
3759 else
3760 {
3761 for (i = 0; i < (full ? 4 : 2); i++)
3762 aarch64_set_vec_float (cpu, vd, i,
3763 aarch64_get_vec_float (cpu, vn, i)
3764 - aarch64_get_vec_float (cpu, vm, i));
3765 }
3766 }
3767 else
3768 {
3769 if (INSTR (22, 22))
3770 {
3771 if (! full)
3772 HALT_NYI;
3773
3774 for (i = 0; i < 2; i++)
3775 aarch64_set_vec_double (cpu, vd, i,
3776 aarch64_get_vec_double (cpu, vm, i)
3777 + aarch64_get_vec_double (cpu, vn, i));
3778 }
3779 else
3780 {
3781 for (i = 0; i < (full ? 4 : 2); i++)
3782 aarch64_set_vec_float (cpu, vd, i,
3783 aarch64_get_vec_float (cpu, vm, i)
3784 + aarch64_get_vec_float (cpu, vn, i));
3785 }
3786 }
3787 }
3788
3789 static void
3790 do_vec_add (sim_cpu *cpu)
3791 {
3792 /* instr[31] = 0
3793 instr[30] = full/half selector
3794 instr[29,24] = 001110
3795 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit, 11=> 64-bit
3796 instr[21] = 1
3797 instr[20,16] = Vn
3798 instr[15,10] = 100001
3799 instr[9,5] = Vm
3800 instr[4.0] = Vd. */
3801
3802 unsigned vm = INSTR (20, 16);
3803 unsigned vn = INSTR (9, 5);
3804 unsigned vd = INSTR (4, 0);
3805 unsigned i;
3806 int full = INSTR (30, 30);
3807
3808 NYI_assert (29, 24, 0x0E);
3809 NYI_assert (21, 21, 1);
3810 NYI_assert (15, 10, 0x21);
3811
3812 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3813 switch (INSTR (23, 22))
3814 {
3815 case 0:
3816 for (i = 0; i < (full ? 16 : 8); i++)
3817 aarch64_set_vec_u8 (cpu, vd, i, aarch64_get_vec_u8 (cpu, vn, i)
3818 + aarch64_get_vec_u8 (cpu, vm, i));
3819 return;
3820
3821 case 1:
3822 for (i = 0; i < (full ? 8 : 4); i++)
3823 aarch64_set_vec_u16 (cpu, vd, i, aarch64_get_vec_u16 (cpu, vn, i)
3824 + aarch64_get_vec_u16 (cpu, vm, i));
3825 return;
3826
3827 case 2:
3828 for (i = 0; i < (full ? 4 : 2); i++)
3829 aarch64_set_vec_u32 (cpu, vd, i, aarch64_get_vec_u32 (cpu, vn, i)
3830 + aarch64_get_vec_u32 (cpu, vm, i));
3831 return;
3832
3833 case 3:
3834 if (! full)
3835 HALT_UNALLOC;
3836 aarch64_set_vec_u64 (cpu, vd, 0, aarch64_get_vec_u64 (cpu, vn, 0)
3837 + aarch64_get_vec_u64 (cpu, vm, 0));
3838 aarch64_set_vec_u64 (cpu, vd, 1,
3839 aarch64_get_vec_u64 (cpu, vn, 1)
3840 + aarch64_get_vec_u64 (cpu, vm, 1));
3841 return;
3842 }
3843 }
3844
3845 static void
3846 do_vec_mul (sim_cpu *cpu)
3847 {
3848 /* instr[31] = 0
3849 instr[30] = full/half selector
3850 instr[29,24] = 00 1110
3851 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit
3852 instr[21] = 1
3853 instr[20,16] = Vn
3854 instr[15,10] = 10 0111
3855 instr[9,5] = Vm
3856 instr[4.0] = Vd. */
3857
3858 unsigned vm = INSTR (20, 16);
3859 unsigned vn = INSTR (9, 5);
3860 unsigned vd = INSTR (4, 0);
3861 unsigned i;
3862 int full = INSTR (30, 30);
3863 int bias = 0;
3864
3865 NYI_assert (29, 24, 0x0E);
3866 NYI_assert (21, 21, 1);
3867 NYI_assert (15, 10, 0x27);
3868
3869 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3870 switch (INSTR (23, 22))
3871 {
3872 case 0:
3873 DO_VEC_WIDENING_MUL (full ? 16 : 8, uint8_t, u8, u8);
3874 return;
3875
3876 case 1:
3877 DO_VEC_WIDENING_MUL (full ? 8 : 4, uint16_t, u16, u16);
3878 return;
3879
3880 case 2:
3881 DO_VEC_WIDENING_MUL (full ? 4 : 2, uint32_t, u32, u32);
3882 return;
3883
3884 case 3:
3885 HALT_UNALLOC;
3886 }
3887 }
3888
3889 static void
3890 do_vec_MLA (sim_cpu *cpu)
3891 {
3892 /* instr[31] = 0
3893 instr[30] = full/half selector
3894 instr[29,24] = 00 1110
3895 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit
3896 instr[21] = 1
3897 instr[20,16] = Vn
3898 instr[15,10] = 1001 01
3899 instr[9,5] = Vm
3900 instr[4.0] = Vd. */
3901
3902 unsigned vm = INSTR (20, 16);
3903 unsigned vn = INSTR (9, 5);
3904 unsigned vd = INSTR (4, 0);
3905 unsigned i;
3906 int full = INSTR (30, 30);
3907
3908 NYI_assert (29, 24, 0x0E);
3909 NYI_assert (21, 21, 1);
3910 NYI_assert (15, 10, 0x25);
3911
3912 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
3913 switch (INSTR (23, 22))
3914 {
3915 case 0:
3916 for (i = 0; i < (full ? 16 : 8); i++)
3917 aarch64_set_vec_u8 (cpu, vd, i,
3918 aarch64_get_vec_u8 (cpu, vd, i)
3919 + (aarch64_get_vec_u8 (cpu, vn, i)
3920 * aarch64_get_vec_u8 (cpu, vm, i)));
3921 return;
3922
3923 case 1:
3924 for (i = 0; i < (full ? 8 : 4); i++)
3925 aarch64_set_vec_u16 (cpu, vd, i,
3926 aarch64_get_vec_u16 (cpu, vd, i)
3927 + (aarch64_get_vec_u16 (cpu, vn, i)
3928 * aarch64_get_vec_u16 (cpu, vm, i)));
3929 return;
3930
3931 case 2:
3932 for (i = 0; i < (full ? 4 : 2); i++)
3933 aarch64_set_vec_u32 (cpu, vd, i,
3934 aarch64_get_vec_u32 (cpu, vd, i)
3935 + (aarch64_get_vec_u32 (cpu, vn, i)
3936 * aarch64_get_vec_u32 (cpu, vm, i)));
3937 return;
3938
3939 default:
3940 HALT_UNALLOC;
3941 }
3942 }
3943
3944 static float
3945 fmaxnm (float a, float b)
3946 {
3947 if (! isnan (a))
3948 {
3949 if (! isnan (b))
3950 return a > b ? a : b;
3951 return a;
3952 }
3953 else if (! isnan (b))
3954 return b;
3955 return a;
3956 }
3957
3958 static float
3959 fminnm (float a, float b)
3960 {
3961 if (! isnan (a))
3962 {
3963 if (! isnan (b))
3964 return a < b ? a : b;
3965 return a;
3966 }
3967 else if (! isnan (b))
3968 return b;
3969 return a;
3970 }
3971
3972 static double
3973 dmaxnm (double a, double b)
3974 {
3975 if (! isnan (a))
3976 {
3977 if (! isnan (b))
3978 return a > b ? a : b;
3979 return a;
3980 }
3981 else if (! isnan (b))
3982 return b;
3983 return a;
3984 }
3985
3986 static double
3987 dminnm (double a, double b)
3988 {
3989 if (! isnan (a))
3990 {
3991 if (! isnan (b))
3992 return a < b ? a : b;
3993 return a;
3994 }
3995 else if (! isnan (b))
3996 return b;
3997 return a;
3998 }
3999
4000 static void
4001 do_vec_FminmaxNMP (sim_cpu *cpu)
4002 {
4003 /* instr [31] = 0
4004 instr [30] = half (0)/full (1)
4005 instr [29,24] = 10 1110
4006 instr [23] = max(0)/min(1)
4007 instr [22] = float (0)/double (1)
4008 instr [21] = 1
4009 instr [20,16] = Vn
4010 instr [15,10] = 1100 01
4011 instr [9,5] = Vm
4012 instr [4.0] = Vd. */
4013
4014 unsigned vm = INSTR (20, 16);
4015 unsigned vn = INSTR (9, 5);
4016 unsigned vd = INSTR (4, 0);
4017 int full = INSTR (30, 30);
4018
4019 NYI_assert (29, 24, 0x2E);
4020 NYI_assert (21, 21, 1);
4021 NYI_assert (15, 10, 0x31);
4022
4023 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4024 if (INSTR (22, 22))
4025 {
4026 double (* fn)(double, double) = INSTR (23, 23)
4027 ? dminnm : dmaxnm;
4028
4029 if (! full)
4030 HALT_NYI;
4031 aarch64_set_vec_double (cpu, vd, 0,
4032 fn (aarch64_get_vec_double (cpu, vn, 0),
4033 aarch64_get_vec_double (cpu, vn, 1)));
4034 aarch64_set_vec_double (cpu, vd, 0,
4035 fn (aarch64_get_vec_double (cpu, vm, 0),
4036 aarch64_get_vec_double (cpu, vm, 1)));
4037 }
4038 else
4039 {
4040 float (* fn)(float, float) = INSTR (23, 23)
4041 ? fminnm : fmaxnm;
4042
4043 aarch64_set_vec_float (cpu, vd, 0,
4044 fn (aarch64_get_vec_float (cpu, vn, 0),
4045 aarch64_get_vec_float (cpu, vn, 1)));
4046 if (full)
4047 aarch64_set_vec_float (cpu, vd, 1,
4048 fn (aarch64_get_vec_float (cpu, vn, 2),
4049 aarch64_get_vec_float (cpu, vn, 3)));
4050
4051 aarch64_set_vec_float (cpu, vd, (full ? 2 : 1),
4052 fn (aarch64_get_vec_float (cpu, vm, 0),
4053 aarch64_get_vec_float (cpu, vm, 1)));
4054 if (full)
4055 aarch64_set_vec_float (cpu, vd, 3,
4056 fn (aarch64_get_vec_float (cpu, vm, 2),
4057 aarch64_get_vec_float (cpu, vm, 3)));
4058 }
4059 }
4060
4061 static void
4062 do_vec_AND (sim_cpu *cpu)
4063 {
4064 /* instr[31] = 0
4065 instr[30] = half (0)/full (1)
4066 instr[29,21] = 001110001
4067 instr[20,16] = Vm
4068 instr[15,10] = 000111
4069 instr[9,5] = Vn
4070 instr[4.0] = Vd. */
4071
4072 unsigned vm = INSTR (20, 16);
4073 unsigned vn = INSTR (9, 5);
4074 unsigned vd = INSTR (4, 0);
4075 unsigned i;
4076 int full = INSTR (30, 30);
4077
4078 NYI_assert (29, 21, 0x071);
4079 NYI_assert (15, 10, 0x07);
4080
4081 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4082 for (i = 0; i < (full ? 4 : 2); i++)
4083 aarch64_set_vec_u32 (cpu, vd, i,
4084 aarch64_get_vec_u32 (cpu, vn, i)
4085 & aarch64_get_vec_u32 (cpu, vm, i));
4086 }
4087
4088 static void
4089 do_vec_BSL (sim_cpu *cpu)
4090 {
4091 /* instr[31] = 0
4092 instr[30] = half (0)/full (1)
4093 instr[29,21] = 101110011
4094 instr[20,16] = Vm
4095 instr[15,10] = 000111
4096 instr[9,5] = Vn
4097 instr[4.0] = Vd. */
4098
4099 unsigned vm = INSTR (20, 16);
4100 unsigned vn = INSTR (9, 5);
4101 unsigned vd = INSTR (4, 0);
4102 unsigned i;
4103 int full = INSTR (30, 30);
4104
4105 NYI_assert (29, 21, 0x173);
4106 NYI_assert (15, 10, 0x07);
4107
4108 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4109 for (i = 0; i < (full ? 16 : 8); i++)
4110 aarch64_set_vec_u8 (cpu, vd, i,
4111 ( aarch64_get_vec_u8 (cpu, vd, i)
4112 & aarch64_get_vec_u8 (cpu, vn, i))
4113 | ((~ aarch64_get_vec_u8 (cpu, vd, i))
4114 & aarch64_get_vec_u8 (cpu, vm, i)));
4115 }
4116
4117 static void
4118 do_vec_EOR (sim_cpu *cpu)
4119 {
4120 /* instr[31] = 0
4121 instr[30] = half (0)/full (1)
4122 instr[29,21] = 10 1110 001
4123 instr[20,16] = Vm
4124 instr[15,10] = 000111
4125 instr[9,5] = Vn
4126 instr[4.0] = Vd. */
4127
4128 unsigned vm = INSTR (20, 16);
4129 unsigned vn = INSTR (9, 5);
4130 unsigned vd = INSTR (4, 0);
4131 unsigned i;
4132 int full = INSTR (30, 30);
4133
4134 NYI_assert (29, 21, 0x171);
4135 NYI_assert (15, 10, 0x07);
4136
4137 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4138 for (i = 0; i < (full ? 4 : 2); i++)
4139 aarch64_set_vec_u32 (cpu, vd, i,
4140 aarch64_get_vec_u32 (cpu, vn, i)
4141 ^ aarch64_get_vec_u32 (cpu, vm, i));
4142 }
4143
4144 static void
4145 do_vec_bit (sim_cpu *cpu)
4146 {
4147 /* instr[31] = 0
4148 instr[30] = half (0)/full (1)
4149 instr[29,23] = 10 1110 1
4150 instr[22] = BIT (0) / BIF (1)
4151 instr[21] = 1
4152 instr[20,16] = Vm
4153 instr[15,10] = 0001 11
4154 instr[9,5] = Vn
4155 instr[4.0] = Vd. */
4156
4157 unsigned vm = INSTR (20, 16);
4158 unsigned vn = INSTR (9, 5);
4159 unsigned vd = INSTR (4, 0);
4160 unsigned full = INSTR (30, 30);
4161 unsigned test_false = INSTR (22, 22);
4162 unsigned i;
4163
4164 NYI_assert (29, 23, 0x5D);
4165 NYI_assert (21, 21, 1);
4166 NYI_assert (15, 10, 0x07);
4167
4168 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4169 for (i = 0; i < (full ? 4 : 2); i++)
4170 {
4171 uint32_t vd_val = aarch64_get_vec_u32 (cpu, vd, i);
4172 uint32_t vn_val = aarch64_get_vec_u32 (cpu, vn, i);
4173 uint32_t vm_val = aarch64_get_vec_u32 (cpu, vm, i);
4174 if (test_false)
4175 aarch64_set_vec_u32 (cpu, vd, i,
4176 (vd_val & vm_val) | (vn_val & ~vm_val));
4177 else
4178 aarch64_set_vec_u32 (cpu, vd, i,
4179 (vd_val & ~vm_val) | (vn_val & vm_val));
4180 }
4181 }
4182
4183 static void
4184 do_vec_ORN (sim_cpu *cpu)
4185 {
4186 /* instr[31] = 0
4187 instr[30] = half (0)/full (1)
4188 instr[29,21] = 00 1110 111
4189 instr[20,16] = Vm
4190 instr[15,10] = 00 0111
4191 instr[9,5] = Vn
4192 instr[4.0] = Vd. */
4193
4194 unsigned vm = INSTR (20, 16);
4195 unsigned vn = INSTR (9, 5);
4196 unsigned vd = INSTR (4, 0);
4197 unsigned i;
4198 int full = INSTR (30, 30);
4199
4200 NYI_assert (29, 21, 0x077);
4201 NYI_assert (15, 10, 0x07);
4202
4203 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4204 for (i = 0; i < (full ? 16 : 8); i++)
4205 aarch64_set_vec_u8 (cpu, vd, i,
4206 aarch64_get_vec_u8 (cpu, vn, i)
4207 | ~ aarch64_get_vec_u8 (cpu, vm, i));
4208 }
4209
4210 static void
4211 do_vec_ORR (sim_cpu *cpu)
4212 {
4213 /* instr[31] = 0
4214 instr[30] = half (0)/full (1)
4215 instr[29,21] = 00 1110 101
4216 instr[20,16] = Vm
4217 instr[15,10] = 0001 11
4218 instr[9,5] = Vn
4219 instr[4.0] = Vd. */
4220
4221 unsigned vm = INSTR (20, 16);
4222 unsigned vn = INSTR (9, 5);
4223 unsigned vd = INSTR (4, 0);
4224 unsigned i;
4225 int full = INSTR (30, 30);
4226
4227 NYI_assert (29, 21, 0x075);
4228 NYI_assert (15, 10, 0x07);
4229
4230 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4231 for (i = 0; i < (full ? 16 : 8); i++)
4232 aarch64_set_vec_u8 (cpu, vd, i,
4233 aarch64_get_vec_u8 (cpu, vn, i)
4234 | aarch64_get_vec_u8 (cpu, vm, i));
4235 }
4236
4237 static void
4238 do_vec_BIC (sim_cpu *cpu)
4239 {
4240 /* instr[31] = 0
4241 instr[30] = half (0)/full (1)
4242 instr[29,21] = 00 1110 011
4243 instr[20,16] = Vm
4244 instr[15,10] = 00 0111
4245 instr[9,5] = Vn
4246 instr[4.0] = Vd. */
4247
4248 unsigned vm = INSTR (20, 16);
4249 unsigned vn = INSTR (9, 5);
4250 unsigned vd = INSTR (4, 0);
4251 unsigned i;
4252 int full = INSTR (30, 30);
4253
4254 NYI_assert (29, 21, 0x073);
4255 NYI_assert (15, 10, 0x07);
4256
4257 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4258 for (i = 0; i < (full ? 16 : 8); i++)
4259 aarch64_set_vec_u8 (cpu, vd, i,
4260 aarch64_get_vec_u8 (cpu, vn, i)
4261 & ~ aarch64_get_vec_u8 (cpu, vm, i));
4262 }
4263
4264 static void
4265 do_vec_XTN (sim_cpu *cpu)
4266 {
4267 /* instr[31] = 0
4268 instr[30] = first part (0)/ second part (1)
4269 instr[29,24] = 00 1110
4270 instr[23,22] = size: byte(00), half(01), word (10)
4271 instr[21,10] = 1000 0100 1010
4272 instr[9,5] = Vs
4273 instr[4,0] = Vd. */
4274
4275 unsigned vs = INSTR (9, 5);
4276 unsigned vd = INSTR (4, 0);
4277 unsigned bias = INSTR (30, 30);
4278 unsigned i;
4279
4280 NYI_assert (29, 24, 0x0E);
4281 NYI_assert (21, 10, 0x84A);
4282
4283 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4284 switch (INSTR (23, 22))
4285 {
4286 case 0:
4287 for (i = 0; i < 8; i++)
4288 aarch64_set_vec_u8 (cpu, vd, i + (bias * 8),
4289 aarch64_get_vec_u16 (cpu, vs, i));
4290 return;
4291
4292 case 1:
4293 for (i = 0; i < 4; i++)
4294 aarch64_set_vec_u16 (cpu, vd, i + (bias * 4),
4295 aarch64_get_vec_u32 (cpu, vs, i));
4296 return;
4297
4298 case 2:
4299 for (i = 0; i < 2; i++)
4300 aarch64_set_vec_u32 (cpu, vd, i + (bias * 2),
4301 aarch64_get_vec_u64 (cpu, vs, i));
4302 return;
4303 }
4304 }
4305
4306 /* Return the number of bits set in the input value. */
4307 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
4308 # define popcount __builtin_popcount
4309 #else
4310 static int
4311 popcount (unsigned char x)
4312 {
4313 static const unsigned char popcnt[16] =
4314 {
4315 0, 1, 1, 2,
4316 1, 2, 2, 3,
4317 1, 2, 2, 3,
4318 2, 3, 3, 4
4319 };
4320
4321 /* Only counts the low 8 bits of the input as that is all we need. */
4322 return popcnt[x % 16] + popcnt[x / 16];
4323 }
4324 #endif
4325
4326 static void
4327 do_vec_CNT (sim_cpu *cpu)
4328 {
4329 /* instr[31] = 0
4330 instr[30] = half (0)/ full (1)
4331 instr[29,24] = 00 1110
4332 instr[23,22] = size: byte(00)
4333 instr[21,10] = 1000 0001 0110
4334 instr[9,5] = Vs
4335 instr[4,0] = Vd. */
4336
4337 unsigned vs = INSTR (9, 5);
4338 unsigned vd = INSTR (4, 0);
4339 int full = INSTR (30, 30);
4340 int size = INSTR (23, 22);
4341 int i;
4342
4343 NYI_assert (29, 24, 0x0E);
4344 NYI_assert (21, 10, 0x816);
4345
4346 if (size != 0)
4347 HALT_UNALLOC;
4348
4349 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4350
4351 for (i = 0; i < (full ? 16 : 8); i++)
4352 aarch64_set_vec_u8 (cpu, vd, i,
4353 popcount (aarch64_get_vec_u8 (cpu, vs, i)));
4354 }
4355
4356 static void
4357 do_vec_maxv (sim_cpu *cpu)
4358 {
4359 /* instr[31] = 0
4360 instr[30] = half(0)/full(1)
4361 instr[29] = signed (0)/unsigned(1)
4362 instr[28,24] = 0 1110
4363 instr[23,22] = size: byte(00), half(01), word (10)
4364 instr[21] = 1
4365 instr[20,17] = 1 000
4366 instr[16] = max(0)/min(1)
4367 instr[15,10] = 1010 10
4368 instr[9,5] = V source
4369 instr[4.0] = R dest. */
4370
4371 unsigned vs = INSTR (9, 5);
4372 unsigned rd = INSTR (4, 0);
4373 unsigned full = INSTR (30, 30);
4374 unsigned i;
4375
4376 NYI_assert (28, 24, 0x0E);
4377 NYI_assert (21, 21, 1);
4378 NYI_assert (20, 17, 8);
4379 NYI_assert (15, 10, 0x2A);
4380
4381 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4382 switch ((INSTR (29, 29) << 1) | INSTR (16, 16))
4383 {
4384 case 0: /* SMAXV. */
4385 {
4386 int64_t smax;
4387 switch (INSTR (23, 22))
4388 {
4389 case 0:
4390 smax = aarch64_get_vec_s8 (cpu, vs, 0);
4391 for (i = 1; i < (full ? 16 : 8); i++)
4392 smax = max (smax, aarch64_get_vec_s8 (cpu, vs, i));
4393 break;
4394 case 1:
4395 smax = aarch64_get_vec_s16 (cpu, vs, 0);
4396 for (i = 1; i < (full ? 8 : 4); i++)
4397 smax = max (smax, aarch64_get_vec_s16 (cpu, vs, i));
4398 break;
4399 case 2:
4400 smax = aarch64_get_vec_s32 (cpu, vs, 0);
4401 for (i = 1; i < (full ? 4 : 2); i++)
4402 smax = max (smax, aarch64_get_vec_s32 (cpu, vs, i));
4403 break;
4404 case 3:
4405 HALT_UNALLOC;
4406 }
4407 aarch64_set_reg_s64 (cpu, rd, NO_SP, smax);
4408 return;
4409 }
4410
4411 case 1: /* SMINV. */
4412 {
4413 int64_t smin;
4414 switch (INSTR (23, 22))
4415 {
4416 case 0:
4417 smin = aarch64_get_vec_s8 (cpu, vs, 0);
4418 for (i = 1; i < (full ? 16 : 8); i++)
4419 smin = min (smin, aarch64_get_vec_s8 (cpu, vs, i));
4420 break;
4421 case 1:
4422 smin = aarch64_get_vec_s16 (cpu, vs, 0);
4423 for (i = 1; i < (full ? 8 : 4); i++)
4424 smin = min (smin, aarch64_get_vec_s16 (cpu, vs, i));
4425 break;
4426 case 2:
4427 smin = aarch64_get_vec_s32 (cpu, vs, 0);
4428 for (i = 1; i < (full ? 4 : 2); i++)
4429 smin = min (smin, aarch64_get_vec_s32 (cpu, vs, i));
4430 break;
4431
4432 case 3:
4433 HALT_UNALLOC;
4434 }
4435 aarch64_set_reg_s64 (cpu, rd, NO_SP, smin);
4436 return;
4437 }
4438
4439 case 2: /* UMAXV. */
4440 {
4441 uint64_t umax;
4442 switch (INSTR (23, 22))
4443 {
4444 case 0:
4445 umax = aarch64_get_vec_u8 (cpu, vs, 0);
4446 for (i = 1; i < (full ? 16 : 8); i++)
4447 umax = max (umax, aarch64_get_vec_u8 (cpu, vs, i));
4448 break;
4449 case 1:
4450 umax = aarch64_get_vec_u16 (cpu, vs, 0);
4451 for (i = 1; i < (full ? 8 : 4); i++)
4452 umax = max (umax, aarch64_get_vec_u16 (cpu, vs, i));
4453 break;
4454 case 2:
4455 umax = aarch64_get_vec_u32 (cpu, vs, 0);
4456 for (i = 1; i < (full ? 4 : 2); i++)
4457 umax = max (umax, aarch64_get_vec_u32 (cpu, vs, i));
4458 break;
4459
4460 case 3:
4461 HALT_UNALLOC;
4462 }
4463 aarch64_set_reg_u64 (cpu, rd, NO_SP, umax);
4464 return;
4465 }
4466
4467 case 3: /* UMINV. */
4468 {
4469 uint64_t umin;
4470 switch (INSTR (23, 22))
4471 {
4472 case 0:
4473 umin = aarch64_get_vec_u8 (cpu, vs, 0);
4474 for (i = 1; i < (full ? 16 : 8); i++)
4475 umin = min (umin, aarch64_get_vec_u8 (cpu, vs, i));
4476 break;
4477 case 1:
4478 umin = aarch64_get_vec_u16 (cpu, vs, 0);
4479 for (i = 1; i < (full ? 8 : 4); i++)
4480 umin = min (umin, aarch64_get_vec_u16 (cpu, vs, i));
4481 break;
4482 case 2:
4483 umin = aarch64_get_vec_u32 (cpu, vs, 0);
4484 for (i = 1; i < (full ? 4 : 2); i++)
4485 umin = min (umin, aarch64_get_vec_u32 (cpu, vs, i));
4486 break;
4487
4488 case 3:
4489 HALT_UNALLOC;
4490 }
4491 aarch64_set_reg_u64 (cpu, rd, NO_SP, umin);
4492 return;
4493 }
4494 }
4495 }
4496
4497 static void
4498 do_vec_fminmaxV (sim_cpu *cpu)
4499 {
4500 /* instr[31,24] = 0110 1110
4501 instr[23] = max(0)/min(1)
4502 instr[22,14] = 011 0000 11
4503 instr[13,12] = nm(00)/normal(11)
4504 instr[11,10] = 10
4505 instr[9,5] = V source
4506 instr[4.0] = R dest. */
4507
4508 unsigned vs = INSTR (9, 5);
4509 unsigned rd = INSTR (4, 0);
4510 unsigned i;
4511 float res = aarch64_get_vec_float (cpu, vs, 0);
4512
4513 NYI_assert (31, 24, 0x6E);
4514 NYI_assert (22, 14, 0x0C3);
4515 NYI_assert (11, 10, 2);
4516
4517 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4518 if (INSTR (23, 23))
4519 {
4520 switch (INSTR (13, 12))
4521 {
4522 case 0: /* FMNINNMV. */
4523 for (i = 1; i < 4; i++)
4524 res = fminnm (res, aarch64_get_vec_float (cpu, vs, i));
4525 break;
4526
4527 case 3: /* FMINV. */
4528 for (i = 1; i < 4; i++)
4529 res = min (res, aarch64_get_vec_float (cpu, vs, i));
4530 break;
4531
4532 default:
4533 HALT_NYI;
4534 }
4535 }
4536 else
4537 {
4538 switch (INSTR (13, 12))
4539 {
4540 case 0: /* FMNAXNMV. */
4541 for (i = 1; i < 4; i++)
4542 res = fmaxnm (res, aarch64_get_vec_float (cpu, vs, i));
4543 break;
4544
4545 case 3: /* FMAXV. */
4546 for (i = 1; i < 4; i++)
4547 res = max (res, aarch64_get_vec_float (cpu, vs, i));
4548 break;
4549
4550 default:
4551 HALT_NYI;
4552 }
4553 }
4554
4555 aarch64_set_FP_float (cpu, rd, res);
4556 }
4557
4558 static void
4559 do_vec_Fminmax (sim_cpu *cpu)
4560 {
4561 /* instr[31] = 0
4562 instr[30] = half(0)/full(1)
4563 instr[29,24] = 00 1110
4564 instr[23] = max(0)/min(1)
4565 instr[22] = float(0)/double(1)
4566 instr[21] = 1
4567 instr[20,16] = Vm
4568 instr[15,14] = 11
4569 instr[13,12] = nm(00)/normal(11)
4570 instr[11,10] = 01
4571 instr[9,5] = Vn
4572 instr[4,0] = Vd. */
4573
4574 unsigned vm = INSTR (20, 16);
4575 unsigned vn = INSTR (9, 5);
4576 unsigned vd = INSTR (4, 0);
4577 unsigned full = INSTR (30, 30);
4578 unsigned min = INSTR (23, 23);
4579 unsigned i;
4580
4581 NYI_assert (29, 24, 0x0E);
4582 NYI_assert (21, 21, 1);
4583 NYI_assert (15, 14, 3);
4584 NYI_assert (11, 10, 1);
4585
4586 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4587 if (INSTR (22, 22))
4588 {
4589 double (* func)(double, double);
4590
4591 if (! full)
4592 HALT_NYI;
4593
4594 if (INSTR (13, 12) == 0)
4595 func = min ? dminnm : dmaxnm;
4596 else if (INSTR (13, 12) == 3)
4597 func = min ? fmin : fmax;
4598 else
4599 HALT_NYI;
4600
4601 for (i = 0; i < 2; i++)
4602 aarch64_set_vec_double (cpu, vd, i,
4603 func (aarch64_get_vec_double (cpu, vn, i),
4604 aarch64_get_vec_double (cpu, vm, i)));
4605 }
4606 else
4607 {
4608 float (* func)(float, float);
4609
4610 if (INSTR (13, 12) == 0)
4611 func = min ? fminnm : fmaxnm;
4612 else if (INSTR (13, 12) == 3)
4613 func = min ? fminf : fmaxf;
4614 else
4615 HALT_NYI;
4616
4617 for (i = 0; i < (full ? 4 : 2); i++)
4618 aarch64_set_vec_float (cpu, vd, i,
4619 func (aarch64_get_vec_float (cpu, vn, i),
4620 aarch64_get_vec_float (cpu, vm, i)));
4621 }
4622 }
4623
4624 static void
4625 do_vec_SCVTF (sim_cpu *cpu)
4626 {
4627 /* instr[31] = 0
4628 instr[30] = Q
4629 instr[29,23] = 00 1110 0
4630 instr[22] = float(0)/double(1)
4631 instr[21,10] = 10 0001 1101 10
4632 instr[9,5] = Vn
4633 instr[4,0] = Vd. */
4634
4635 unsigned vn = INSTR (9, 5);
4636 unsigned vd = INSTR (4, 0);
4637 unsigned full = INSTR (30, 30);
4638 unsigned size = INSTR (22, 22);
4639 unsigned i;
4640
4641 NYI_assert (29, 23, 0x1C);
4642 NYI_assert (21, 10, 0x876);
4643
4644 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4645 if (size)
4646 {
4647 if (! full)
4648 HALT_UNALLOC;
4649
4650 for (i = 0; i < 2; i++)
4651 {
4652 double val = (double) aarch64_get_vec_u64 (cpu, vn, i);
4653 aarch64_set_vec_double (cpu, vd, i, val);
4654 }
4655 }
4656 else
4657 {
4658 for (i = 0; i < (full ? 4 : 2); i++)
4659 {
4660 float val = (float) aarch64_get_vec_u32 (cpu, vn, i);
4661 aarch64_set_vec_float (cpu, vd, i, val);
4662 }
4663 }
4664 }
4665
4666 #define VEC_CMP(SOURCE, CMP) \
4667 do \
4668 { \
4669 switch (size) \
4670 { \
4671 case 0: \
4672 for (i = 0; i < (full ? 16 : 8); i++) \
4673 aarch64_set_vec_u8 (cpu, vd, i, \
4674 aarch64_get_vec_##SOURCE##8 (cpu, vn, i) \
4675 CMP \
4676 aarch64_get_vec_##SOURCE##8 (cpu, vm, i) \
4677 ? -1 : 0); \
4678 return; \
4679 case 1: \
4680 for (i = 0; i < (full ? 8 : 4); i++) \
4681 aarch64_set_vec_u16 (cpu, vd, i, \
4682 aarch64_get_vec_##SOURCE##16 (cpu, vn, i) \
4683 CMP \
4684 aarch64_get_vec_##SOURCE##16 (cpu, vm, i) \
4685 ? -1 : 0); \
4686 return; \
4687 case 2: \
4688 for (i = 0; i < (full ? 4 : 2); i++) \
4689 aarch64_set_vec_u32 (cpu, vd, i, \
4690 aarch64_get_vec_##SOURCE##32 (cpu, vn, i) \
4691 CMP \
4692 aarch64_get_vec_##SOURCE##32 (cpu, vm, i) \
4693 ? -1 : 0); \
4694 return; \
4695 case 3: \
4696 if (! full) \
4697 HALT_UNALLOC; \
4698 for (i = 0; i < 2; i++) \
4699 aarch64_set_vec_u64 (cpu, vd, i, \
4700 aarch64_get_vec_##SOURCE##64 (cpu, vn, i) \
4701 CMP \
4702 aarch64_get_vec_##SOURCE##64 (cpu, vm, i) \
4703 ? -1ULL : 0); \
4704 return; \
4705 } \
4706 } \
4707 while (0)
4708
4709 #define VEC_CMP0(SOURCE, CMP) \
4710 do \
4711 { \
4712 switch (size) \
4713 { \
4714 case 0: \
4715 for (i = 0; i < (full ? 16 : 8); i++) \
4716 aarch64_set_vec_u8 (cpu, vd, i, \
4717 aarch64_get_vec_##SOURCE##8 (cpu, vn, i) \
4718 CMP 0 ? -1 : 0); \
4719 return; \
4720 case 1: \
4721 for (i = 0; i < (full ? 8 : 4); i++) \
4722 aarch64_set_vec_u16 (cpu, vd, i, \
4723 aarch64_get_vec_##SOURCE##16 (cpu, vn, i) \
4724 CMP 0 ? -1 : 0); \
4725 return; \
4726 case 2: \
4727 for (i = 0; i < (full ? 4 : 2); i++) \
4728 aarch64_set_vec_u32 (cpu, vd, i, \
4729 aarch64_get_vec_##SOURCE##32 (cpu, vn, i) \
4730 CMP 0 ? -1 : 0); \
4731 return; \
4732 case 3: \
4733 if (! full) \
4734 HALT_UNALLOC; \
4735 for (i = 0; i < 2; i++) \
4736 aarch64_set_vec_u64 (cpu, vd, i, \
4737 aarch64_get_vec_##SOURCE##64 (cpu, vn, i) \
4738 CMP 0 ? -1ULL : 0); \
4739 return; \
4740 } \
4741 } \
4742 while (0)
4743
4744 #define VEC_FCMP0(CMP) \
4745 do \
4746 { \
4747 if (vm != 0) \
4748 HALT_NYI; \
4749 if (INSTR (22, 22)) \
4750 { \
4751 if (! full) \
4752 HALT_NYI; \
4753 for (i = 0; i < 2; i++) \
4754 aarch64_set_vec_u64 (cpu, vd, i, \
4755 aarch64_get_vec_double (cpu, vn, i) \
4756 CMP 0.0 ? -1 : 0); \
4757 } \
4758 else \
4759 { \
4760 for (i = 0; i < (full ? 4 : 2); i++) \
4761 aarch64_set_vec_u32 (cpu, vd, i, \
4762 aarch64_get_vec_float (cpu, vn, i) \
4763 CMP 0.0 ? -1 : 0); \
4764 } \
4765 return; \
4766 } \
4767 while (0)
4768
4769 #define VEC_FCMP(CMP) \
4770 do \
4771 { \
4772 if (INSTR (22, 22)) \
4773 { \
4774 if (! full) \
4775 HALT_NYI; \
4776 for (i = 0; i < 2; i++) \
4777 aarch64_set_vec_u64 (cpu, vd, i, \
4778 aarch64_get_vec_double (cpu, vn, i) \
4779 CMP \
4780 aarch64_get_vec_double (cpu, vm, i) \
4781 ? -1 : 0); \
4782 } \
4783 else \
4784 { \
4785 for (i = 0; i < (full ? 4 : 2); i++) \
4786 aarch64_set_vec_u32 (cpu, vd, i, \
4787 aarch64_get_vec_float (cpu, vn, i) \
4788 CMP \
4789 aarch64_get_vec_float (cpu, vm, i) \
4790 ? -1 : 0); \
4791 } \
4792 return; \
4793 } \
4794 while (0)
4795
4796 static void
4797 do_vec_compare (sim_cpu *cpu)
4798 {
4799 /* instr[31] = 0
4800 instr[30] = half(0)/full(1)
4801 instr[29] = part-of-comparison-type
4802 instr[28,24] = 0 1110
4803 instr[23,22] = size of integer compares: byte(00), half(01), word (10), long (11)
4804 type of float compares: single (-0) / double (-1)
4805 instr[21] = 1
4806 instr[20,16] = Vm or 00000 (compare vs 0)
4807 instr[15,10] = part-of-comparison-type
4808 instr[9,5] = Vn
4809 instr[4.0] = Vd. */
4810
4811 int full = INSTR (30, 30);
4812 int size = INSTR (23, 22);
4813 unsigned vm = INSTR (20, 16);
4814 unsigned vn = INSTR (9, 5);
4815 unsigned vd = INSTR (4, 0);
4816 unsigned i;
4817
4818 NYI_assert (28, 24, 0x0E);
4819 NYI_assert (21, 21, 1);
4820
4821 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4822 if ((INSTR (11, 11)
4823 && INSTR (14, 14))
4824 || ((INSTR (11, 11) == 0
4825 && INSTR (10, 10) == 0)))
4826 {
4827 /* A compare vs 0. */
4828 if (vm != 0)
4829 {
4830 if (INSTR (15, 10) == 0x2A)
4831 do_vec_maxv (cpu);
4832 else if (INSTR (15, 10) == 0x32
4833 || INSTR (15, 10) == 0x3E)
4834 do_vec_fminmaxV (cpu);
4835 else if (INSTR (29, 23) == 0x1C
4836 && INSTR (21, 10) == 0x876)
4837 do_vec_SCVTF (cpu);
4838 else
4839 HALT_NYI;
4840 return;
4841 }
4842 }
4843
4844 if (INSTR (14, 14))
4845 {
4846 /* A floating point compare. */
4847 unsigned decode = (INSTR (29, 29) << 5) | (INSTR (23, 23) << 4)
4848 | INSTR (13, 10);
4849
4850 NYI_assert (15, 15, 1);
4851
4852 switch (decode)
4853 {
4854 case /* 0b010010: GT#0 */ 0x12: VEC_FCMP0 (>);
4855 case /* 0b110010: GE#0 */ 0x32: VEC_FCMP0 (>=);
4856 case /* 0b010110: EQ#0 */ 0x16: VEC_FCMP0 (==);
4857 case /* 0b110110: LE#0 */ 0x36: VEC_FCMP0 (<=);
4858 case /* 0b011010: LT#0 */ 0x1A: VEC_FCMP0 (<);
4859 case /* 0b111001: GT */ 0x39: VEC_FCMP (>);
4860 case /* 0b101001: GE */ 0x29: VEC_FCMP (>=);
4861 case /* 0b001001: EQ */ 0x09: VEC_FCMP (==);
4862
4863 default:
4864 HALT_NYI;
4865 }
4866 }
4867 else
4868 {
4869 unsigned decode = (INSTR (29, 29) << 6) | INSTR (15, 10);
4870
4871 switch (decode)
4872 {
4873 case 0x0D: /* 0001101 GT */ VEC_CMP (s, > );
4874 case 0x0F: /* 0001111 GE */ VEC_CMP (s, >= );
4875 case 0x22: /* 0100010 GT #0 */ VEC_CMP0 (s, > );
4876 case 0x23: /* 0100011 TST */ VEC_CMP (u, & );
4877 case 0x26: /* 0100110 EQ #0 */ VEC_CMP0 (s, == );
4878 case 0x2A: /* 0101010 LT #0 */ VEC_CMP0 (s, < );
4879 case 0x4D: /* 1001101 HI */ VEC_CMP (u, > );
4880 case 0x4F: /* 1001111 HS */ VEC_CMP (u, >= );
4881 case 0x62: /* 1100010 GE #0 */ VEC_CMP0 (s, >= );
4882 case 0x63: /* 1100011 EQ */ VEC_CMP (u, == );
4883 case 0x66: /* 1100110 LE #0 */ VEC_CMP0 (s, <= );
4884 default:
4885 if (vm == 0)
4886 HALT_NYI;
4887 do_vec_maxv (cpu);
4888 }
4889 }
4890 }
4891
4892 static void
4893 do_vec_SSHL (sim_cpu *cpu)
4894 {
4895 /* instr[31] = 0
4896 instr[30] = first part (0)/ second part (1)
4897 instr[29,24] = 00 1110
4898 instr[23,22] = size: byte(00), half(01), word (10), long (11)
4899 instr[21] = 1
4900 instr[20,16] = Vm
4901 instr[15,10] = 0100 01
4902 instr[9,5] = Vn
4903 instr[4,0] = Vd. */
4904
4905 unsigned full = INSTR (30, 30);
4906 unsigned vm = INSTR (20, 16);
4907 unsigned vn = INSTR (9, 5);
4908 unsigned vd = INSTR (4, 0);
4909 unsigned i;
4910 signed int shift;
4911
4912 NYI_assert (29, 24, 0x0E);
4913 NYI_assert (21, 21, 1);
4914 NYI_assert (15, 10, 0x11);
4915
4916 /* FIXME: What is a signed shift left in this context ?. */
4917
4918 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
4919 switch (INSTR (23, 22))
4920 {
4921 case 0:
4922 for (i = 0; i < (full ? 16 : 8); i++)
4923 {
4924 shift = aarch64_get_vec_s8 (cpu, vm, i);
4925 if (shift >= 0)
4926 aarch64_set_vec_s8 (cpu, vd, i, aarch64_get_vec_s8 (cpu, vn, i)
4927 << shift);
4928 else
4929 aarch64_set_vec_s8 (cpu, vd, i, aarch64_get_vec_s8 (cpu, vn, i)
4930 >> - shift);
4931 }
4932 return;
4933
4934 case 1:
4935 for (i = 0; i < (full ? 8 : 4); i++)
4936 {
4937 shift = aarch64_get_vec_s8 (cpu, vm, i * 2);
4938 if (shift >= 0)
4939 aarch64_set_vec_s16 (cpu, vd, i, aarch64_get_vec_s16 (cpu, vn, i)
4940 << shift);
4941 else
4942 aarch64_set_vec_s16 (cpu, vd, i, aarch64_get_vec_s16 (cpu, vn, i)
4943 >> - shift);
4944 }
4945 return;
4946
4947 case 2:
4948 for (i = 0; i < (full ? 4 : 2); i++)
4949 {
4950 shift = aarch64_get_vec_s8 (cpu, vm, i * 4);
4951 if (shift >= 0)
4952 aarch64_set_vec_s32 (cpu, vd, i, aarch64_get_vec_s32 (cpu, vn, i)
4953 << shift);
4954 else
4955 aarch64_set_vec_s32 (cpu, vd, i, aarch64_get_vec_s32 (cpu, vn, i)
4956 >> - shift);
4957 }
4958 return;
4959
4960 case 3:
4961 if (! full)
4962 HALT_UNALLOC;
4963 for (i = 0; i < 2; i++)
4964 {
4965 shift = aarch64_get_vec_s8 (cpu, vm, i * 8);
4966 if (shift >= 0)
4967 aarch64_set_vec_s64 (cpu, vd, i, aarch64_get_vec_s64 (cpu, vn, i)
4968 << shift);
4969 else
4970 aarch64_set_vec_s64 (cpu, vd, i, aarch64_get_vec_s64 (cpu, vn, i)
4971 >> - shift);
4972 }
4973 return;
4974 }
4975 }
4976
4977 static void
4978 do_vec_USHL (sim_cpu *cpu)
4979 {
4980 /* instr[31] = 0
4981 instr[30] = first part (0)/ second part (1)
4982 instr[29,24] = 10 1110
4983 instr[23,22] = size: byte(00), half(01), word (10), long (11)
4984 instr[21] = 1
4985 instr[20,16] = Vm
4986 instr[15,10] = 0100 01
4987 instr[9,5] = Vn
4988 instr[4,0] = Vd */
4989
4990 unsigned full = INSTR (30, 30);
4991 unsigned vm = INSTR (20, 16);
4992 unsigned vn = INSTR (9, 5);
4993 unsigned vd = INSTR (4, 0);
4994 unsigned i;
4995 signed int shift;
4996
4997 NYI_assert (29, 24, 0x2E);
4998 NYI_assert (15, 10, 0x11);
4999
5000 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5001 switch (INSTR (23, 22))
5002 {
5003 case 0:
5004 for (i = 0; i < (full ? 16 : 8); i++)
5005 {
5006 shift = aarch64_get_vec_s8 (cpu, vm, i);
5007 if (shift >= 0)
5008 aarch64_set_vec_u8 (cpu, vd, i, aarch64_get_vec_u8 (cpu, vn, i)
5009 << shift);
5010 else
5011 aarch64_set_vec_u8 (cpu, vd, i, aarch64_get_vec_u8 (cpu, vn, i)
5012 >> - shift);
5013 }
5014 return;
5015
5016 case 1:
5017 for (i = 0; i < (full ? 8 : 4); i++)
5018 {
5019 shift = aarch64_get_vec_s8 (cpu, vm, i * 2);
5020 if (shift >= 0)
5021 aarch64_set_vec_u16 (cpu, vd, i, aarch64_get_vec_u16 (cpu, vn, i)
5022 << shift);
5023 else
5024 aarch64_set_vec_u16 (cpu, vd, i, aarch64_get_vec_u16 (cpu, vn, i)
5025 >> - shift);
5026 }
5027 return;
5028
5029 case 2:
5030 for (i = 0; i < (full ? 4 : 2); i++)
5031 {
5032 shift = aarch64_get_vec_s8 (cpu, vm, i * 4);
5033 if (shift >= 0)
5034 aarch64_set_vec_u32 (cpu, vd, i, aarch64_get_vec_u32 (cpu, vn, i)
5035 << shift);
5036 else
5037 aarch64_set_vec_u32 (cpu, vd, i, aarch64_get_vec_u32 (cpu, vn, i)
5038 >> - shift);
5039 }
5040 return;
5041
5042 case 3:
5043 if (! full)
5044 HALT_UNALLOC;
5045 for (i = 0; i < 2; i++)
5046 {
5047 shift = aarch64_get_vec_s8 (cpu, vm, i * 8);
5048 if (shift >= 0)
5049 aarch64_set_vec_u64 (cpu, vd, i, aarch64_get_vec_u64 (cpu, vn, i)
5050 << shift);
5051 else
5052 aarch64_set_vec_u64 (cpu, vd, i, aarch64_get_vec_u64 (cpu, vn, i)
5053 >> - shift);
5054 }
5055 return;
5056 }
5057 }
5058
5059 static void
5060 do_vec_FMLA (sim_cpu *cpu)
5061 {
5062 /* instr[31] = 0
5063 instr[30] = full/half selector
5064 instr[29,23] = 0011100
5065 instr[22] = size: 0=>float, 1=>double
5066 instr[21] = 1
5067 instr[20,16] = Vn
5068 instr[15,10] = 1100 11
5069 instr[9,5] = Vm
5070 instr[4.0] = Vd. */
5071
5072 unsigned vm = INSTR (20, 16);
5073 unsigned vn = INSTR (9, 5);
5074 unsigned vd = INSTR (4, 0);
5075 unsigned i;
5076 int full = INSTR (30, 30);
5077
5078 NYI_assert (29, 23, 0x1C);
5079 NYI_assert (21, 21, 1);
5080 NYI_assert (15, 10, 0x33);
5081
5082 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5083 if (INSTR (22, 22))
5084 {
5085 if (! full)
5086 HALT_UNALLOC;
5087 for (i = 0; i < 2; i++)
5088 aarch64_set_vec_double (cpu, vd, i,
5089 aarch64_get_vec_double (cpu, vn, i) *
5090 aarch64_get_vec_double (cpu, vm, i) +
5091 aarch64_get_vec_double (cpu, vd, i));
5092 }
5093 else
5094 {
5095 for (i = 0; i < (full ? 4 : 2); i++)
5096 aarch64_set_vec_float (cpu, vd, i,
5097 aarch64_get_vec_float (cpu, vn, i) *
5098 aarch64_get_vec_float (cpu, vm, i) +
5099 aarch64_get_vec_float (cpu, vd, i));
5100 }
5101 }
5102
5103 static void
5104 do_vec_max (sim_cpu *cpu)
5105 {
5106 /* instr[31] = 0
5107 instr[30] = full/half selector
5108 instr[29] = SMAX (0) / UMAX (1)
5109 instr[28,24] = 0 1110
5110 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit
5111 instr[21] = 1
5112 instr[20,16] = Vn
5113 instr[15,10] = 0110 01
5114 instr[9,5] = Vm
5115 instr[4.0] = Vd. */
5116
5117 unsigned vm = INSTR (20, 16);
5118 unsigned vn = INSTR (9, 5);
5119 unsigned vd = INSTR (4, 0);
5120 unsigned i;
5121 int full = INSTR (30, 30);
5122
5123 NYI_assert (28, 24, 0x0E);
5124 NYI_assert (21, 21, 1);
5125 NYI_assert (15, 10, 0x19);
5126
5127 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5128 if (INSTR (29, 29))
5129 {
5130 switch (INSTR (23, 22))
5131 {
5132 case 0:
5133 for (i = 0; i < (full ? 16 : 8); i++)
5134 aarch64_set_vec_u8 (cpu, vd, i,
5135 aarch64_get_vec_u8 (cpu, vn, i)
5136 > aarch64_get_vec_u8 (cpu, vm, i)
5137 ? aarch64_get_vec_u8 (cpu, vn, i)
5138 : aarch64_get_vec_u8 (cpu, vm, i));
5139 return;
5140
5141 case 1:
5142 for (i = 0; i < (full ? 8 : 4); i++)
5143 aarch64_set_vec_u16 (cpu, vd, i,
5144 aarch64_get_vec_u16 (cpu, vn, i)
5145 > aarch64_get_vec_u16 (cpu, vm, i)
5146 ? aarch64_get_vec_u16 (cpu, vn, i)
5147 : aarch64_get_vec_u16 (cpu, vm, i));
5148 return;
5149
5150 case 2:
5151 for (i = 0; i < (full ? 4 : 2); i++)
5152 aarch64_set_vec_u32 (cpu, vd, i,
5153 aarch64_get_vec_u32 (cpu, vn, i)
5154 > aarch64_get_vec_u32 (cpu, vm, i)
5155 ? aarch64_get_vec_u32 (cpu, vn, i)
5156 : aarch64_get_vec_u32 (cpu, vm, i));
5157 return;
5158
5159 case 3:
5160 HALT_UNALLOC;
5161 }
5162 }
5163 else
5164 {
5165 switch (INSTR (23, 22))
5166 {
5167 case 0:
5168 for (i = 0; i < (full ? 16 : 8); i++)
5169 aarch64_set_vec_s8 (cpu, vd, i,
5170 aarch64_get_vec_s8 (cpu, vn, i)
5171 > aarch64_get_vec_s8 (cpu, vm, i)
5172 ? aarch64_get_vec_s8 (cpu, vn, i)
5173 : aarch64_get_vec_s8 (cpu, vm, i));
5174 return;
5175
5176 case 1:
5177 for (i = 0; i < (full ? 8 : 4); i++)
5178 aarch64_set_vec_s16 (cpu, vd, i,
5179 aarch64_get_vec_s16 (cpu, vn, i)
5180 > aarch64_get_vec_s16 (cpu, vm, i)
5181 ? aarch64_get_vec_s16 (cpu, vn, i)
5182 : aarch64_get_vec_s16 (cpu, vm, i));
5183 return;
5184
5185 case 2:
5186 for (i = 0; i < (full ? 4 : 2); i++)
5187 aarch64_set_vec_s32 (cpu, vd, i,
5188 aarch64_get_vec_s32 (cpu, vn, i)
5189 > aarch64_get_vec_s32 (cpu, vm, i)
5190 ? aarch64_get_vec_s32 (cpu, vn, i)
5191 : aarch64_get_vec_s32 (cpu, vm, i));
5192 return;
5193
5194 case 3:
5195 HALT_UNALLOC;
5196 }
5197 }
5198 }
5199
5200 static void
5201 do_vec_min (sim_cpu *cpu)
5202 {
5203 /* instr[31] = 0
5204 instr[30] = full/half selector
5205 instr[29] = SMIN (0) / UMIN (1)
5206 instr[28,24] = 0 1110
5207 instr[23,22] = size: 00=> 8-bit, 01=> 16-bit, 10=> 32-bit
5208 instr[21] = 1
5209 instr[20,16] = Vn
5210 instr[15,10] = 0110 11
5211 instr[9,5] = Vm
5212 instr[4.0] = Vd. */
5213
5214 unsigned vm = INSTR (20, 16);
5215 unsigned vn = INSTR (9, 5);
5216 unsigned vd = INSTR (4, 0);
5217 unsigned i;
5218 int full = INSTR (30, 30);
5219
5220 NYI_assert (28, 24, 0x0E);
5221 NYI_assert (21, 21, 1);
5222 NYI_assert (15, 10, 0x1B);
5223
5224 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5225 if (INSTR (29, 29))
5226 {
5227 switch (INSTR (23, 22))
5228 {
5229 case 0:
5230 for (i = 0; i < (full ? 16 : 8); i++)
5231 aarch64_set_vec_u8 (cpu, vd, i,
5232 aarch64_get_vec_u8 (cpu, vn, i)
5233 < aarch64_get_vec_u8 (cpu, vm, i)
5234 ? aarch64_get_vec_u8 (cpu, vn, i)
5235 : aarch64_get_vec_u8 (cpu, vm, i));
5236 return;
5237
5238 case 1:
5239 for (i = 0; i < (full ? 8 : 4); i++)
5240 aarch64_set_vec_u16 (cpu, vd, i,
5241 aarch64_get_vec_u16 (cpu, vn, i)
5242 < aarch64_get_vec_u16 (cpu, vm, i)
5243 ? aarch64_get_vec_u16 (cpu, vn, i)
5244 : aarch64_get_vec_u16 (cpu, vm, i));
5245 return;
5246
5247 case 2:
5248 for (i = 0; i < (full ? 4 : 2); i++)
5249 aarch64_set_vec_u32 (cpu, vd, i,
5250 aarch64_get_vec_u32 (cpu, vn, i)
5251 < aarch64_get_vec_u32 (cpu, vm, i)
5252 ? aarch64_get_vec_u32 (cpu, vn, i)
5253 : aarch64_get_vec_u32 (cpu, vm, i));
5254 return;
5255
5256 case 3:
5257 HALT_UNALLOC;
5258 }
5259 }
5260 else
5261 {
5262 switch (INSTR (23, 22))
5263 {
5264 case 0:
5265 for (i = 0; i < (full ? 16 : 8); i++)
5266 aarch64_set_vec_s8 (cpu, vd, i,
5267 aarch64_get_vec_s8 (cpu, vn, i)
5268 < aarch64_get_vec_s8 (cpu, vm, i)
5269 ? aarch64_get_vec_s8 (cpu, vn, i)
5270 : aarch64_get_vec_s8 (cpu, vm, i));
5271 return;
5272
5273 case 1:
5274 for (i = 0; i < (full ? 8 : 4); i++)
5275 aarch64_set_vec_s16 (cpu, vd, i,
5276 aarch64_get_vec_s16 (cpu, vn, i)
5277 < aarch64_get_vec_s16 (cpu, vm, i)
5278 ? aarch64_get_vec_s16 (cpu, vn, i)
5279 : aarch64_get_vec_s16 (cpu, vm, i));
5280 return;
5281
5282 case 2:
5283 for (i = 0; i < (full ? 4 : 2); i++)
5284 aarch64_set_vec_s32 (cpu, vd, i,
5285 aarch64_get_vec_s32 (cpu, vn, i)
5286 < aarch64_get_vec_s32 (cpu, vm, i)
5287 ? aarch64_get_vec_s32 (cpu, vn, i)
5288 : aarch64_get_vec_s32 (cpu, vm, i));
5289 return;
5290
5291 case 3:
5292 HALT_UNALLOC;
5293 }
5294 }
5295 }
5296
5297 static void
5298 do_vec_sub_long (sim_cpu *cpu)
5299 {
5300 /* instr[31] = 0
5301 instr[30] = lower (0) / upper (1)
5302 instr[29] = signed (0) / unsigned (1)
5303 instr[28,24] = 0 1110
5304 instr[23,22] = size: bytes (00), half (01), word (10)
5305 instr[21] = 1
5306 insrt[20,16] = Vm
5307 instr[15,10] = 0010 00
5308 instr[9,5] = Vn
5309 instr[4,0] = V dest. */
5310
5311 unsigned size = INSTR (23, 22);
5312 unsigned vm = INSTR (20, 16);
5313 unsigned vn = INSTR (9, 5);
5314 unsigned vd = INSTR (4, 0);
5315 unsigned bias = 0;
5316 unsigned i;
5317
5318 NYI_assert (28, 24, 0x0E);
5319 NYI_assert (21, 21, 1);
5320 NYI_assert (15, 10, 0x08);
5321
5322 if (size == 3)
5323 HALT_UNALLOC;
5324
5325 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5326 switch (INSTR (30, 29))
5327 {
5328 case 2: /* SSUBL2. */
5329 bias = 2;
5330 case 0: /* SSUBL. */
5331 switch (size)
5332 {
5333 case 0:
5334 bias *= 3;
5335 for (i = 0; i < 8; i++)
5336 aarch64_set_vec_s16 (cpu, vd, i,
5337 aarch64_get_vec_s8 (cpu, vn, i + bias)
5338 - aarch64_get_vec_s8 (cpu, vm, i + bias));
5339 break;
5340
5341 case 1:
5342 bias *= 2;
5343 for (i = 0; i < 4; i++)
5344 aarch64_set_vec_s32 (cpu, vd, i,
5345 aarch64_get_vec_s16 (cpu, vn, i + bias)
5346 - aarch64_get_vec_s16 (cpu, vm, i + bias));
5347 break;
5348
5349 case 2:
5350 for (i = 0; i < 2; i++)
5351 aarch64_set_vec_s64 (cpu, vd, i,
5352 aarch64_get_vec_s32 (cpu, vn, i + bias)
5353 - aarch64_get_vec_s32 (cpu, vm, i + bias));
5354 break;
5355
5356 default:
5357 HALT_UNALLOC;
5358 }
5359 break;
5360
5361 case 3: /* USUBL2. */
5362 bias = 2;
5363 case 1: /* USUBL. */
5364 switch (size)
5365 {
5366 case 0:
5367 bias *= 3;
5368 for (i = 0; i < 8; i++)
5369 aarch64_set_vec_u16 (cpu, vd, i,
5370 aarch64_get_vec_u8 (cpu, vn, i + bias)
5371 - aarch64_get_vec_u8 (cpu, vm, i + bias));
5372 break;
5373
5374 case 1:
5375 bias *= 2;
5376 for (i = 0; i < 4; i++)
5377 aarch64_set_vec_u32 (cpu, vd, i,
5378 aarch64_get_vec_u16 (cpu, vn, i + bias)
5379 - aarch64_get_vec_u16 (cpu, vm, i + bias));
5380 break;
5381
5382 case 2:
5383 for (i = 0; i < 2; i++)
5384 aarch64_set_vec_u64 (cpu, vd, i,
5385 aarch64_get_vec_u32 (cpu, vn, i + bias)
5386 - aarch64_get_vec_u32 (cpu, vm, i + bias));
5387 break;
5388
5389 default:
5390 HALT_UNALLOC;
5391 }
5392 break;
5393 }
5394 }
5395
5396 static void
5397 do_vec_ADDP (sim_cpu *cpu)
5398 {
5399 /* instr[31] = 0
5400 instr[30] = half(0)/full(1)
5401 instr[29,24] = 00 1110
5402 instr[23,22] = size: bytes (00), half (01), word (10), long (11)
5403 instr[21] = 1
5404 insrt[20,16] = Vm
5405 instr[15,10] = 1011 11
5406 instr[9,5] = Vn
5407 instr[4,0] = V dest. */
5408
5409 FRegister copy_vn;
5410 FRegister copy_vm;
5411 unsigned full = INSTR (30, 30);
5412 unsigned size = INSTR (23, 22);
5413 unsigned vm = INSTR (20, 16);
5414 unsigned vn = INSTR (9, 5);
5415 unsigned vd = INSTR (4, 0);
5416 unsigned i, range;
5417
5418 NYI_assert (29, 24, 0x0E);
5419 NYI_assert (21, 21, 1);
5420 NYI_assert (15, 10, 0x2F);
5421
5422 /* Make copies of the source registers in case vd == vn/vm. */
5423 copy_vn = cpu->fr[vn];
5424 copy_vm = cpu->fr[vm];
5425
5426 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5427 switch (size)
5428 {
5429 case 0:
5430 range = full ? 8 : 4;
5431 for (i = 0; i < range; i++)
5432 {
5433 aarch64_set_vec_u8 (cpu, vd, i,
5434 copy_vn.b[i * 2] + copy_vn.b[i * 2 + 1]);
5435 aarch64_set_vec_u8 (cpu, vd, i + range,
5436 copy_vm.b[i * 2] + copy_vm.b[i * 2 + 1]);
5437 }
5438 return;
5439
5440 case 1:
5441 range = full ? 4 : 2;
5442 for (i = 0; i < range; i++)
5443 {
5444 aarch64_set_vec_u16 (cpu, vd, i,
5445 copy_vn.h[i * 2] + copy_vn.h[i * 2 + 1]);
5446 aarch64_set_vec_u16 (cpu, vd, i + range,
5447 copy_vm.h[i * 2] + copy_vm.h[i * 2 + 1]);
5448 }
5449 return;
5450
5451 case 2:
5452 range = full ? 2 : 1;
5453 for (i = 0; i < range; i++)
5454 {
5455 aarch64_set_vec_u32 (cpu, vd, i,
5456 copy_vn.w[i * 2] + copy_vn.w[i * 2 + 1]);
5457 aarch64_set_vec_u32 (cpu, vd, i + range,
5458 copy_vm.w[i * 2] + copy_vm.w[i * 2 + 1]);
5459 }
5460 return;
5461
5462 case 3:
5463 if (! full)
5464 HALT_UNALLOC;
5465 aarch64_set_vec_u64 (cpu, vd, 0, copy_vn.v[0] + copy_vn.v[1]);
5466 aarch64_set_vec_u64 (cpu, vd, 1, copy_vm.v[0] + copy_vm.v[1]);
5467 return;
5468 }
5469 }
5470
5471 /* Float point vector convert to longer (precision). */
5472 static void
5473 do_vec_FCVTL (sim_cpu *cpu)
5474 {
5475 /* instr[31] = 0
5476 instr[30] = half (0) / all (1)
5477 instr[29,23] = 00 1110 0
5478 instr[22] = single (0) / double (1)
5479 instr[21,10] = 10 0001 0111 10
5480 instr[9,5] = Rn
5481 instr[4,0] = Rd. */
5482
5483 unsigned rn = INSTR (9, 5);
5484 unsigned rd = INSTR (4, 0);
5485 unsigned full = INSTR (30, 30);
5486 unsigned i;
5487
5488 NYI_assert (31, 31, 0);
5489 NYI_assert (29, 23, 0x1C);
5490 NYI_assert (21, 10, 0x85E);
5491
5492 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5493 if (INSTR (22, 22))
5494 {
5495 for (i = 0; i < 2; i++)
5496 aarch64_set_vec_double (cpu, rd, i,
5497 aarch64_get_vec_float (cpu, rn, i + 2*full));
5498 }
5499 else
5500 {
5501 HALT_NYI;
5502
5503 #if 0
5504 /* TODO: Implement missing half-float support. */
5505 for (i = 0; i < 4; i++)
5506 aarch64_set_vec_float (cpu, rd, i,
5507 aarch64_get_vec_halffloat (cpu, rn, i + 4*full));
5508 #endif
5509 }
5510 }
5511
5512 static void
5513 do_vec_FABS (sim_cpu *cpu)
5514 {
5515 /* instr[31] = 0
5516 instr[30] = half(0)/full(1)
5517 instr[29,23] = 00 1110 1
5518 instr[22] = float(0)/double(1)
5519 instr[21,16] = 10 0000
5520 instr[15,10] = 1111 10
5521 instr[9,5] = Vn
5522 instr[4,0] = Vd. */
5523
5524 unsigned vn = INSTR (9, 5);
5525 unsigned vd = INSTR (4, 0);
5526 unsigned full = INSTR (30, 30);
5527 unsigned i;
5528
5529 NYI_assert (29, 23, 0x1D);
5530 NYI_assert (21, 10, 0x83E);
5531
5532 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5533 if (INSTR (22, 22))
5534 {
5535 if (! full)
5536 HALT_NYI;
5537
5538 for (i = 0; i < 2; i++)
5539 aarch64_set_vec_double (cpu, vd, i,
5540 fabs (aarch64_get_vec_double (cpu, vn, i)));
5541 }
5542 else
5543 {
5544 for (i = 0; i < (full ? 4 : 2); i++)
5545 aarch64_set_vec_float (cpu, vd, i,
5546 fabsf (aarch64_get_vec_float (cpu, vn, i)));
5547 }
5548 }
5549
5550 static void
5551 do_vec_FCVTZS (sim_cpu *cpu)
5552 {
5553 /* instr[31] = 0
5554 instr[30] = half (0) / all (1)
5555 instr[29,23] = 00 1110 1
5556 instr[22] = single (0) / double (1)
5557 instr[21,10] = 10 0001 1011 10
5558 instr[9,5] = Rn
5559 instr[4,0] = Rd. */
5560
5561 unsigned rn = INSTR (9, 5);
5562 unsigned rd = INSTR (4, 0);
5563 unsigned full = INSTR (30, 30);
5564 unsigned i;
5565
5566 NYI_assert (31, 31, 0);
5567 NYI_assert (29, 23, 0x1D);
5568 NYI_assert (21, 10, 0x86E);
5569
5570 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5571 if (INSTR (22, 22))
5572 {
5573 if (! full)
5574 HALT_UNALLOC;
5575
5576 for (i = 0; i < 2; i++)
5577 aarch64_set_vec_s64 (cpu, rd, i,
5578 (int64_t) aarch64_get_vec_double (cpu, rn, i));
5579 }
5580 else
5581 for (i = 0; i < (full ? 4 : 2); i++)
5582 aarch64_set_vec_s32 (cpu, rd, i,
5583 (int32_t) aarch64_get_vec_float (cpu, rn, i));
5584 }
5585
5586 static void
5587 do_vec_REV64 (sim_cpu *cpu)
5588 {
5589 /* instr[31] = 0
5590 instr[30] = full/half
5591 instr[29,24] = 00 1110
5592 instr[23,22] = size
5593 instr[21,10] = 10 0000 0000 10
5594 instr[9,5] = Rn
5595 instr[4,0] = Rd. */
5596
5597 unsigned rn = INSTR (9, 5);
5598 unsigned rd = INSTR (4, 0);
5599 unsigned size = INSTR (23, 22);
5600 unsigned full = INSTR (30, 30);
5601 unsigned i;
5602 FRegister val;
5603
5604 NYI_assert (29, 24, 0x0E);
5605 NYI_assert (21, 10, 0x802);
5606
5607 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5608 switch (size)
5609 {
5610 case 0:
5611 for (i = 0; i < (full ? 16 : 8); i++)
5612 val.b[i ^ 0x7] = aarch64_get_vec_u8 (cpu, rn, i);
5613 break;
5614
5615 case 1:
5616 for (i = 0; i < (full ? 8 : 4); i++)
5617 val.h[i ^ 0x3] = aarch64_get_vec_u16 (cpu, rn, i);
5618 break;
5619
5620 case 2:
5621 for (i = 0; i < (full ? 4 : 2); i++)
5622 val.w[i ^ 0x1] = aarch64_get_vec_u32 (cpu, rn, i);
5623 break;
5624
5625 case 3:
5626 HALT_UNALLOC;
5627 }
5628
5629 aarch64_set_vec_u64 (cpu, rd, 0, val.v[0]);
5630 if (full)
5631 aarch64_set_vec_u64 (cpu, rd, 1, val.v[1]);
5632 }
5633
5634 static void
5635 do_vec_REV16 (sim_cpu *cpu)
5636 {
5637 /* instr[31] = 0
5638 instr[30] = full/half
5639 instr[29,24] = 00 1110
5640 instr[23,22] = size
5641 instr[21,10] = 10 0000 0001 10
5642 instr[9,5] = Rn
5643 instr[4,0] = Rd. */
5644
5645 unsigned rn = INSTR (9, 5);
5646 unsigned rd = INSTR (4, 0);
5647 unsigned size = INSTR (23, 22);
5648 unsigned full = INSTR (30, 30);
5649 unsigned i;
5650 FRegister val;
5651
5652 NYI_assert (29, 24, 0x0E);
5653 NYI_assert (21, 10, 0x806);
5654
5655 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5656 switch (size)
5657 {
5658 case 0:
5659 for (i = 0; i < (full ? 16 : 8); i++)
5660 val.b[i ^ 0x1] = aarch64_get_vec_u8 (cpu, rn, i);
5661 break;
5662
5663 default:
5664 HALT_UNALLOC;
5665 }
5666
5667 aarch64_set_vec_u64 (cpu, rd, 0, val.v[0]);
5668 if (full)
5669 aarch64_set_vec_u64 (cpu, rd, 1, val.v[1]);
5670 }
5671
5672 static void
5673 do_vec_op1 (sim_cpu *cpu)
5674 {
5675 /* instr[31] = 0
5676 instr[30] = half/full
5677 instr[29,24] = 00 1110
5678 instr[23,21] = ???
5679 instr[20,16] = Vm
5680 instr[15,10] = sub-opcode
5681 instr[9,5] = Vn
5682 instr[4,0] = Vd */
5683 NYI_assert (29, 24, 0x0E);
5684
5685 if (INSTR (21, 21) == 0)
5686 {
5687 if (INSTR (23, 22) == 0)
5688 {
5689 if (INSTR (30, 30) == 1
5690 && INSTR (17, 14) == 0
5691 && INSTR (12, 10) == 7)
5692 return do_vec_ins_2 (cpu);
5693
5694 switch (INSTR (15, 10))
5695 {
5696 case 0x01: do_vec_DUP_vector_into_vector (cpu); return;
5697 case 0x03: do_vec_DUP_scalar_into_vector (cpu); return;
5698 case 0x07: do_vec_INS (cpu); return;
5699 case 0x0B: do_vec_SMOV_into_scalar (cpu); return;
5700 case 0x0F: do_vec_UMOV_into_scalar (cpu); return;
5701
5702 case 0x00:
5703 case 0x08:
5704 case 0x10:
5705 case 0x18:
5706 do_vec_TBL (cpu); return;
5707
5708 case 0x06:
5709 case 0x16:
5710 do_vec_UZP (cpu); return;
5711
5712 case 0x0A: do_vec_TRN (cpu); return;
5713
5714 case 0x0E:
5715 case 0x1E:
5716 do_vec_ZIP (cpu); return;
5717
5718 default:
5719 HALT_NYI;
5720 }
5721 }
5722
5723 switch (INSTR (13, 10))
5724 {
5725 case 0x6: do_vec_UZP (cpu); return;
5726 case 0xE: do_vec_ZIP (cpu); return;
5727 case 0xA: do_vec_TRN (cpu); return;
5728 default: HALT_NYI;
5729 }
5730 }
5731
5732 switch (INSTR (15, 10))
5733 {
5734 case 0x02: do_vec_REV64 (cpu); return;
5735 case 0x06: do_vec_REV16 (cpu); return;
5736
5737 case 0x07:
5738 switch (INSTR (23, 21))
5739 {
5740 case 1: do_vec_AND (cpu); return;
5741 case 3: do_vec_BIC (cpu); return;
5742 case 5: do_vec_ORR (cpu); return;
5743 case 7: do_vec_ORN (cpu); return;
5744 default: HALT_NYI;
5745 }
5746
5747 case 0x08: do_vec_sub_long (cpu); return;
5748 case 0x0a: do_vec_XTN (cpu); return;
5749 case 0x11: do_vec_SSHL (cpu); return;
5750 case 0x16: do_vec_CNT (cpu); return;
5751 case 0x19: do_vec_max (cpu); return;
5752 case 0x1B: do_vec_min (cpu); return;
5753 case 0x21: do_vec_add (cpu); return;
5754 case 0x25: do_vec_MLA (cpu); return;
5755 case 0x27: do_vec_mul (cpu); return;
5756 case 0x2F: do_vec_ADDP (cpu); return;
5757 case 0x30: do_vec_mull (cpu); return;
5758 case 0x33: do_vec_FMLA (cpu); return;
5759 case 0x35: do_vec_fadd (cpu); return;
5760
5761 case 0x1E:
5762 switch (INSTR (20, 16))
5763 {
5764 case 0x01: do_vec_FCVTL (cpu); return;
5765 default: HALT_NYI;
5766 }
5767
5768 case 0x2E:
5769 switch (INSTR (20, 16))
5770 {
5771 case 0x00: do_vec_ABS (cpu); return;
5772 case 0x01: do_vec_FCVTZS (cpu); return;
5773 case 0x11: do_vec_ADDV (cpu); return;
5774 default: HALT_NYI;
5775 }
5776
5777 case 0x31:
5778 case 0x3B:
5779 do_vec_Fminmax (cpu); return;
5780
5781 case 0x0D:
5782 case 0x0F:
5783 case 0x22:
5784 case 0x23:
5785 case 0x26:
5786 case 0x2A:
5787 case 0x32:
5788 case 0x36:
5789 case 0x39:
5790 case 0x3A:
5791 do_vec_compare (cpu); return;
5792
5793 case 0x3E:
5794 do_vec_FABS (cpu); return;
5795
5796 default:
5797 HALT_NYI;
5798 }
5799 }
5800
5801 static void
5802 do_vec_xtl (sim_cpu *cpu)
5803 {
5804 /* instr[31] = 0
5805 instr[30,29] = SXTL (00), UXTL (01), SXTL2 (10), UXTL2 (11)
5806 instr[28,22] = 0 1111 00
5807 instr[21,16] = size & shift (USHLL, SSHLL, USHLL2, SSHLL2)
5808 instr[15,10] = 1010 01
5809 instr[9,5] = V source
5810 instr[4,0] = V dest. */
5811
5812 unsigned vs = INSTR (9, 5);
5813 unsigned vd = INSTR (4, 0);
5814 unsigned i, shift, bias = 0;
5815
5816 NYI_assert (28, 22, 0x3C);
5817 NYI_assert (15, 10, 0x29);
5818
5819 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5820 switch (INSTR (30, 29))
5821 {
5822 case 2: /* SXTL2, SSHLL2. */
5823 bias = 2;
5824 case 0: /* SXTL, SSHLL. */
5825 if (INSTR (21, 21))
5826 {
5827 int64_t val1, val2;
5828
5829 shift = INSTR (20, 16);
5830 /* Get the source values before setting the destination values
5831 in case the source and destination are the same. */
5832 val1 = aarch64_get_vec_s32 (cpu, vs, bias) << shift;
5833 val2 = aarch64_get_vec_s32 (cpu, vs, bias + 1) << shift;
5834 aarch64_set_vec_s64 (cpu, vd, 0, val1);
5835 aarch64_set_vec_s64 (cpu, vd, 1, val2);
5836 }
5837 else if (INSTR (20, 20))
5838 {
5839 int32_t v[4];
5840 int32_t v1,v2,v3,v4;
5841
5842 shift = INSTR (19, 16);
5843 bias *= 2;
5844 for (i = 0; i < 4; i++)
5845 v[i] = aarch64_get_vec_s16 (cpu, vs, bias + i) << shift;
5846 for (i = 0; i < 4; i++)
5847 aarch64_set_vec_s32 (cpu, vd, i, v[i]);
5848 }
5849 else
5850 {
5851 int16_t v[8];
5852 NYI_assert (19, 19, 1);
5853
5854 shift = INSTR (18, 16);
5855 bias *= 4;
5856 for (i = 0; i < 8; i++)
5857 v[i] = aarch64_get_vec_s8 (cpu, vs, i + bias) << shift;
5858 for (i = 0; i < 8; i++)
5859 aarch64_set_vec_s16 (cpu, vd, i, v[i]);
5860 }
5861 return;
5862
5863 case 3: /* UXTL2, USHLL2. */
5864 bias = 2;
5865 case 1: /* UXTL, USHLL. */
5866 if (INSTR (21, 21))
5867 {
5868 uint64_t v1, v2;
5869 shift = INSTR (20, 16);
5870 v1 = aarch64_get_vec_u32 (cpu, vs, bias) << shift;
5871 v2 = aarch64_get_vec_u32 (cpu, vs, bias + 1) << shift;
5872 aarch64_set_vec_u64 (cpu, vd, 0, v1);
5873 aarch64_set_vec_u64 (cpu, vd, 1, v2);
5874 }
5875 else if (INSTR (20, 20))
5876 {
5877 uint32_t v[4];
5878 shift = INSTR (19, 16);
5879 bias *= 2;
5880 for (i = 0; i < 4; i++)
5881 v[i] = aarch64_get_vec_u16 (cpu, vs, i + bias) << shift;
5882 for (i = 0; i < 4; i++)
5883 aarch64_set_vec_u32 (cpu, vd, i, v[i]);
5884 }
5885 else
5886 {
5887 uint16_t v[8];
5888 NYI_assert (19, 19, 1);
5889
5890 shift = INSTR (18, 16);
5891 bias *= 4;
5892 for (i = 0; i < 8; i++)
5893 v[i] = aarch64_get_vec_u8 (cpu, vs, i + bias) << shift;
5894 for (i = 0; i < 8; i++)
5895 aarch64_set_vec_u16 (cpu, vd, i, v[i]);
5896 }
5897 return;
5898 }
5899 }
5900
5901 static void
5902 do_vec_SHL (sim_cpu *cpu)
5903 {
5904 /* instr [31] = 0
5905 instr [30] = half(0)/full(1)
5906 instr [29,23] = 001 1110
5907 instr [22,16] = size and shift amount
5908 instr [15,10] = 01 0101
5909 instr [9, 5] = Vs
5910 instr [4, 0] = Vd. */
5911
5912 int shift;
5913 int full = INSTR (30, 30);
5914 unsigned vs = INSTR (9, 5);
5915 unsigned vd = INSTR (4, 0);
5916 unsigned i;
5917
5918 NYI_assert (29, 23, 0x1E);
5919 NYI_assert (15, 10, 0x15);
5920
5921 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5922 if (INSTR (22, 22))
5923 {
5924 shift = INSTR (21, 16);
5925
5926 if (full == 0)
5927 HALT_UNALLOC;
5928
5929 for (i = 0; i < 2; i++)
5930 {
5931 uint64_t val = aarch64_get_vec_u64 (cpu, vs, i);
5932 aarch64_set_vec_u64 (cpu, vd, i, val << shift);
5933 }
5934
5935 return;
5936 }
5937
5938 if (INSTR (21, 21))
5939 {
5940 shift = INSTR (20, 16);
5941
5942 for (i = 0; i < (full ? 4 : 2); i++)
5943 {
5944 uint32_t val = aarch64_get_vec_u32 (cpu, vs, i);
5945 aarch64_set_vec_u32 (cpu, vd, i, val << shift);
5946 }
5947
5948 return;
5949 }
5950
5951 if (INSTR (20, 20))
5952 {
5953 shift = INSTR (19, 16);
5954
5955 for (i = 0; i < (full ? 8 : 4); i++)
5956 {
5957 uint16_t val = aarch64_get_vec_u16 (cpu, vs, i);
5958 aarch64_set_vec_u16 (cpu, vd, i, val << shift);
5959 }
5960
5961 return;
5962 }
5963
5964 if (INSTR (19, 19) == 0)
5965 HALT_UNALLOC;
5966
5967 shift = INSTR (18, 16);
5968
5969 for (i = 0; i < (full ? 16 : 8); i++)
5970 {
5971 uint8_t val = aarch64_get_vec_u8 (cpu, vs, i);
5972 aarch64_set_vec_u8 (cpu, vd, i, val << shift);
5973 }
5974 }
5975
5976 static void
5977 do_vec_SSHR_USHR (sim_cpu *cpu)
5978 {
5979 /* instr [31] = 0
5980 instr [30] = half(0)/full(1)
5981 instr [29] = signed(0)/unsigned(1)
5982 instr [28,23] = 0 1111 0
5983 instr [22,16] = size and shift amount
5984 instr [15,10] = 0000 01
5985 instr [9, 5] = Vs
5986 instr [4, 0] = Vd. */
5987
5988 int full = INSTR (30, 30);
5989 int sign = ! INSTR (29, 29);
5990 unsigned shift = INSTR (22, 16);
5991 unsigned vs = INSTR (9, 5);
5992 unsigned vd = INSTR (4, 0);
5993 unsigned i;
5994
5995 NYI_assert (28, 23, 0x1E);
5996 NYI_assert (15, 10, 0x01);
5997
5998 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
5999 if (INSTR (22, 22))
6000 {
6001 shift = 128 - shift;
6002
6003 if (full == 0)
6004 HALT_UNALLOC;
6005
6006 if (sign)
6007 for (i = 0; i < 2; i++)
6008 {
6009 int64_t val = aarch64_get_vec_s64 (cpu, vs, i);
6010 aarch64_set_vec_s64 (cpu, vd, i, val >> shift);
6011 }
6012 else
6013 for (i = 0; i < 2; i++)
6014 {
6015 uint64_t val = aarch64_get_vec_u64 (cpu, vs, i);
6016 aarch64_set_vec_u64 (cpu, vd, i, val >> shift);
6017 }
6018
6019 return;
6020 }
6021
6022 if (INSTR (21, 21))
6023 {
6024 shift = 64 - shift;
6025
6026 if (sign)
6027 for (i = 0; i < (full ? 4 : 2); i++)
6028 {
6029 int32_t val = aarch64_get_vec_s32 (cpu, vs, i);
6030 aarch64_set_vec_s32 (cpu, vd, i, val >> shift);
6031 }
6032 else
6033 for (i = 0; i < (full ? 4 : 2); i++)
6034 {
6035 uint32_t val = aarch64_get_vec_u32 (cpu, vs, i);
6036 aarch64_set_vec_u32 (cpu, vd, i, val >> shift);
6037 }
6038
6039 return;
6040 }
6041
6042 if (INSTR (20, 20))
6043 {
6044 shift = 32 - shift;
6045
6046 if (sign)
6047 for (i = 0; i < (full ? 8 : 4); i++)
6048 {
6049 int16_t val = aarch64_get_vec_s16 (cpu, vs, i);
6050 aarch64_set_vec_s16 (cpu, vd, i, val >> shift);
6051 }
6052 else
6053 for (i = 0; i < (full ? 8 : 4); i++)
6054 {
6055 uint16_t val = aarch64_get_vec_u16 (cpu, vs, i);
6056 aarch64_set_vec_u16 (cpu, vd, i, val >> shift);
6057 }
6058
6059 return;
6060 }
6061
6062 if (INSTR (19, 19) == 0)
6063 HALT_UNALLOC;
6064
6065 shift = 16 - shift;
6066
6067 if (sign)
6068 for (i = 0; i < (full ? 16 : 8); i++)
6069 {
6070 int8_t val = aarch64_get_vec_s8 (cpu, vs, i);
6071 aarch64_set_vec_s8 (cpu, vd, i, val >> shift);
6072 }
6073 else
6074 for (i = 0; i < (full ? 16 : 8); i++)
6075 {
6076 uint8_t val = aarch64_get_vec_u8 (cpu, vs, i);
6077 aarch64_set_vec_u8 (cpu, vd, i, val >> shift);
6078 }
6079 }
6080
6081 static void
6082 do_vec_MUL_by_element (sim_cpu *cpu)
6083 {
6084 /* instr[31] = 0
6085 instr[30] = half/full
6086 instr[29,24] = 00 1111
6087 instr[23,22] = size
6088 instr[21] = L
6089 instr[20] = M
6090 instr[19,16] = m
6091 instr[15,12] = 1000
6092 instr[11] = H
6093 instr[10] = 0
6094 instr[9,5] = Vn
6095 instr[4,0] = Vd */
6096
6097 unsigned full = INSTR (30, 30);
6098 unsigned L = INSTR (21, 21);
6099 unsigned H = INSTR (11, 11);
6100 unsigned vn = INSTR (9, 5);
6101 unsigned vd = INSTR (4, 0);
6102 unsigned size = INSTR (23, 22);
6103 unsigned index;
6104 unsigned vm;
6105 unsigned e;
6106
6107 NYI_assert (29, 24, 0x0F);
6108 NYI_assert (15, 12, 0x8);
6109 NYI_assert (10, 10, 0);
6110
6111 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6112 switch (size)
6113 {
6114 case 1:
6115 {
6116 /* 16 bit products. */
6117 uint16_t product;
6118 uint16_t element1;
6119 uint16_t element2;
6120
6121 index = (H << 2) | (L << 1) | INSTR (20, 20);
6122 vm = INSTR (19, 16);
6123 element2 = aarch64_get_vec_u16 (cpu, vm, index);
6124
6125 for (e = 0; e < (full ? 8 : 4); e ++)
6126 {
6127 element1 = aarch64_get_vec_u16 (cpu, vn, e);
6128 product = element1 * element2;
6129 aarch64_set_vec_u16 (cpu, vd, e, product);
6130 }
6131 }
6132 break;
6133
6134 case 2:
6135 {
6136 /* 32 bit products. */
6137 uint32_t product;
6138 uint32_t element1;
6139 uint32_t element2;
6140
6141 index = (H << 1) | L;
6142 vm = INSTR (20, 16);
6143 element2 = aarch64_get_vec_u32 (cpu, vm, index);
6144
6145 for (e = 0; e < (full ? 4 : 2); e ++)
6146 {
6147 element1 = aarch64_get_vec_u32 (cpu, vn, e);
6148 product = element1 * element2;
6149 aarch64_set_vec_u32 (cpu, vd, e, product);
6150 }
6151 }
6152 break;
6153
6154 default:
6155 HALT_UNALLOC;
6156 }
6157 }
6158
6159 static void
6160 do_FMLA_by_element (sim_cpu *cpu)
6161 {
6162 /* instr[31] = 0
6163 instr[30] = half/full
6164 instr[29,23] = 00 1111 1
6165 instr[22] = size
6166 instr[21] = L
6167 instr[20,16] = m
6168 instr[15,12] = 0001
6169 instr[11] = H
6170 instr[10] = 0
6171 instr[9,5] = Vn
6172 instr[4,0] = Vd */
6173
6174 unsigned full = INSTR (30, 30);
6175 unsigned size = INSTR (22, 22);
6176 unsigned L = INSTR (21, 21);
6177 unsigned vm = INSTR (20, 16);
6178 unsigned H = INSTR (11, 11);
6179 unsigned vn = INSTR (9, 5);
6180 unsigned vd = INSTR (4, 0);
6181 unsigned e;
6182
6183 NYI_assert (29, 23, 0x1F);
6184 NYI_assert (15, 12, 0x1);
6185 NYI_assert (10, 10, 0);
6186
6187 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6188 if (size)
6189 {
6190 double element1, element2;
6191
6192 if (! full || L)
6193 HALT_UNALLOC;
6194
6195 element2 = aarch64_get_vec_double (cpu, vm, H);
6196
6197 for (e = 0; e < 2; e++)
6198 {
6199 element1 = aarch64_get_vec_double (cpu, vn, e);
6200 element1 *= element2;
6201 element1 += aarch64_get_vec_double (cpu, vd, e);
6202 aarch64_set_vec_double (cpu, vd, e, element1);
6203 }
6204 }
6205 else
6206 {
6207 float element1;
6208 float element2 = aarch64_get_vec_float (cpu, vm, (H << 1) | L);
6209
6210 for (e = 0; e < (full ? 4 : 2); e++)
6211 {
6212 element1 = aarch64_get_vec_float (cpu, vn, e);
6213 element1 *= element2;
6214 element1 += aarch64_get_vec_float (cpu, vd, e);
6215 aarch64_set_vec_float (cpu, vd, e, element1);
6216 }
6217 }
6218 }
6219
6220 static void
6221 do_vec_op2 (sim_cpu *cpu)
6222 {
6223 /* instr[31] = 0
6224 instr[30] = half/full
6225 instr[29,24] = 00 1111
6226 instr[23] = ?
6227 instr[22,16] = element size & index
6228 instr[15,10] = sub-opcode
6229 instr[9,5] = Vm
6230 instr[4,0] = Vd */
6231
6232 NYI_assert (29, 24, 0x0F);
6233
6234 if (INSTR (23, 23) != 0)
6235 {
6236 switch (INSTR (15, 10))
6237 {
6238 case 0x04:
6239 case 0x06:
6240 do_FMLA_by_element (cpu);
6241 return;
6242
6243 case 0x20:
6244 case 0x22:
6245 do_vec_MUL_by_element (cpu);
6246 return;
6247
6248 default:
6249 HALT_NYI;
6250 }
6251 }
6252 else
6253 {
6254 switch (INSTR (15, 10))
6255 {
6256 case 0x01: do_vec_SSHR_USHR (cpu); return;
6257 case 0x15: do_vec_SHL (cpu); return;
6258 case 0x20:
6259 case 0x22: do_vec_MUL_by_element (cpu); return;
6260 case 0x29: do_vec_xtl (cpu); return;
6261 default: HALT_NYI;
6262 }
6263 }
6264 }
6265
6266 static void
6267 do_vec_neg (sim_cpu *cpu)
6268 {
6269 /* instr[31] = 0
6270 instr[30] = full(1)/half(0)
6271 instr[29,24] = 10 1110
6272 instr[23,22] = size: byte(00), half (01), word (10), long (11)
6273 instr[21,10] = 1000 0010 1110
6274 instr[9,5] = Vs
6275 instr[4,0] = Vd */
6276
6277 int full = INSTR (30, 30);
6278 unsigned vs = INSTR (9, 5);
6279 unsigned vd = INSTR (4, 0);
6280 unsigned i;
6281
6282 NYI_assert (29, 24, 0x2E);
6283 NYI_assert (21, 10, 0x82E);
6284
6285 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6286 switch (INSTR (23, 22))
6287 {
6288 case 0:
6289 for (i = 0; i < (full ? 16 : 8); i++)
6290 aarch64_set_vec_s8 (cpu, vd, i, - aarch64_get_vec_s8 (cpu, vs, i));
6291 return;
6292
6293 case 1:
6294 for (i = 0; i < (full ? 8 : 4); i++)
6295 aarch64_set_vec_s16 (cpu, vd, i, - aarch64_get_vec_s16 (cpu, vs, i));
6296 return;
6297
6298 case 2:
6299 for (i = 0; i < (full ? 4 : 2); i++)
6300 aarch64_set_vec_s32 (cpu, vd, i, - aarch64_get_vec_s32 (cpu, vs, i));
6301 return;
6302
6303 case 3:
6304 if (! full)
6305 HALT_NYI;
6306 for (i = 0; i < 2; i++)
6307 aarch64_set_vec_s64 (cpu, vd, i, - aarch64_get_vec_s64 (cpu, vs, i));
6308 return;
6309 }
6310 }
6311
6312 static void
6313 do_vec_sqrt (sim_cpu *cpu)
6314 {
6315 /* instr[31] = 0
6316 instr[30] = full(1)/half(0)
6317 instr[29,23] = 101 1101
6318 instr[22] = single(0)/double(1)
6319 instr[21,10] = 1000 0111 1110
6320 instr[9,5] = Vs
6321 instr[4,0] = Vd. */
6322
6323 int full = INSTR (30, 30);
6324 unsigned vs = INSTR (9, 5);
6325 unsigned vd = INSTR (4, 0);
6326 unsigned i;
6327
6328 NYI_assert (29, 23, 0x5B);
6329 NYI_assert (21, 10, 0x87E);
6330
6331 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6332 if (INSTR (22, 22) == 0)
6333 for (i = 0; i < (full ? 4 : 2); i++)
6334 aarch64_set_vec_float (cpu, vd, i,
6335 sqrtf (aarch64_get_vec_float (cpu, vs, i)));
6336 else
6337 for (i = 0; i < 2; i++)
6338 aarch64_set_vec_double (cpu, vd, i,
6339 sqrt (aarch64_get_vec_double (cpu, vs, i)));
6340 }
6341
6342 static void
6343 do_vec_mls_indexed (sim_cpu *cpu)
6344 {
6345 /* instr[31] = 0
6346 instr[30] = half(0)/full(1)
6347 instr[29,24] = 10 1111
6348 instr[23,22] = 16-bit(01)/32-bit(10)
6349 instr[21,20+11] = index (if 16-bit)
6350 instr[21+11] = index (if 32-bit)
6351 instr[20,16] = Vm
6352 instr[15,12] = 0100
6353 instr[11] = part of index
6354 instr[10] = 0
6355 instr[9,5] = Vs
6356 instr[4,0] = Vd. */
6357
6358 int full = INSTR (30, 30);
6359 unsigned vs = INSTR (9, 5);
6360 unsigned vd = INSTR (4, 0);
6361 unsigned vm = INSTR (20, 16);
6362 unsigned i;
6363
6364 NYI_assert (15, 12, 4);
6365 NYI_assert (10, 10, 0);
6366
6367 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6368 switch (INSTR (23, 22))
6369 {
6370 case 1:
6371 {
6372 unsigned elem;
6373 uint32_t val;
6374
6375 if (vm > 15)
6376 HALT_NYI;
6377
6378 elem = (INSTR (21, 20) << 1) | INSTR (11, 11);
6379 val = aarch64_get_vec_u16 (cpu, vm, elem);
6380
6381 for (i = 0; i < (full ? 8 : 4); i++)
6382 aarch64_set_vec_u32 (cpu, vd, i,
6383 aarch64_get_vec_u32 (cpu, vd, i) -
6384 (aarch64_get_vec_u32 (cpu, vs, i) * val));
6385 return;
6386 }
6387
6388 case 2:
6389 {
6390 unsigned elem = (INSTR (21, 21) << 1) | INSTR (11, 11);
6391 uint64_t val = aarch64_get_vec_u32 (cpu, vm, elem);
6392
6393 for (i = 0; i < (full ? 4 : 2); i++)
6394 aarch64_set_vec_u64 (cpu, vd, i,
6395 aarch64_get_vec_u64 (cpu, vd, i) -
6396 (aarch64_get_vec_u64 (cpu, vs, i) * val));
6397 return;
6398 }
6399
6400 case 0:
6401 case 3:
6402 default:
6403 HALT_NYI;
6404 }
6405 }
6406
6407 static void
6408 do_vec_SUB (sim_cpu *cpu)
6409 {
6410 /* instr [31] = 0
6411 instr [30] = half(0)/full(1)
6412 instr [29,24] = 10 1110
6413 instr [23,22] = size: byte(00, half(01), word (10), long (11)
6414 instr [21] = 1
6415 instr [20,16] = Vm
6416 instr [15,10] = 10 0001
6417 instr [9, 5] = Vn
6418 instr [4, 0] = Vd. */
6419
6420 unsigned full = INSTR (30, 30);
6421 unsigned vm = INSTR (20, 16);
6422 unsigned vn = INSTR (9, 5);
6423 unsigned vd = INSTR (4, 0);
6424 unsigned i;
6425
6426 NYI_assert (29, 24, 0x2E);
6427 NYI_assert (21, 21, 1);
6428 NYI_assert (15, 10, 0x21);
6429
6430 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6431 switch (INSTR (23, 22))
6432 {
6433 case 0:
6434 for (i = 0; i < (full ? 16 : 8); i++)
6435 aarch64_set_vec_s8 (cpu, vd, i,
6436 aarch64_get_vec_s8 (cpu, vn, i)
6437 - aarch64_get_vec_s8 (cpu, vm, i));
6438 return;
6439
6440 case 1:
6441 for (i = 0; i < (full ? 8 : 4); i++)
6442 aarch64_set_vec_s16 (cpu, vd, i,
6443 aarch64_get_vec_s16 (cpu, vn, i)
6444 - aarch64_get_vec_s16 (cpu, vm, i));
6445 return;
6446
6447 case 2:
6448 for (i = 0; i < (full ? 4 : 2); i++)
6449 aarch64_set_vec_s32 (cpu, vd, i,
6450 aarch64_get_vec_s32 (cpu, vn, i)
6451 - aarch64_get_vec_s32 (cpu, vm, i));
6452 return;
6453
6454 case 3:
6455 if (full == 0)
6456 HALT_UNALLOC;
6457
6458 for (i = 0; i < 2; i++)
6459 aarch64_set_vec_s64 (cpu, vd, i,
6460 aarch64_get_vec_s64 (cpu, vn, i)
6461 - aarch64_get_vec_s64 (cpu, vm, i));
6462 return;
6463 }
6464 }
6465
6466 static void
6467 do_vec_MLS (sim_cpu *cpu)
6468 {
6469 /* instr [31] = 0
6470 instr [30] = half(0)/full(1)
6471 instr [29,24] = 10 1110
6472 instr [23,22] = size: byte(00, half(01), word (10)
6473 instr [21] = 1
6474 instr [20,16] = Vm
6475 instr [15,10] = 10 0101
6476 instr [9, 5] = Vn
6477 instr [4, 0] = Vd. */
6478
6479 unsigned full = INSTR (30, 30);
6480 unsigned vm = INSTR (20, 16);
6481 unsigned vn = INSTR (9, 5);
6482 unsigned vd = INSTR (4, 0);
6483 unsigned i;
6484
6485 NYI_assert (29, 24, 0x2E);
6486 NYI_assert (21, 21, 1);
6487 NYI_assert (15, 10, 0x25);
6488
6489 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6490 switch (INSTR (23, 22))
6491 {
6492 case 0:
6493 for (i = 0; i < (full ? 16 : 8); i++)
6494 aarch64_set_vec_u8 (cpu, vd, i,
6495 aarch64_get_vec_u8 (cpu, vd, i)
6496 - (aarch64_get_vec_u8 (cpu, vn, i)
6497 * aarch64_get_vec_u8 (cpu, vm, i)));
6498 return;
6499
6500 case 1:
6501 for (i = 0; i < (full ? 8 : 4); i++)
6502 aarch64_set_vec_u16 (cpu, vd, i,
6503 aarch64_get_vec_u16 (cpu, vd, i)
6504 - (aarch64_get_vec_u16 (cpu, vn, i)
6505 * aarch64_get_vec_u16 (cpu, vm, i)));
6506 return;
6507
6508 case 2:
6509 for (i = 0; i < (full ? 4 : 2); i++)
6510 aarch64_set_vec_u32 (cpu, vd, i,
6511 aarch64_get_vec_u32 (cpu, vd, i)
6512 - (aarch64_get_vec_u32 (cpu, vn, i)
6513 * aarch64_get_vec_u32 (cpu, vm, i)));
6514 return;
6515
6516 default:
6517 HALT_UNALLOC;
6518 }
6519 }
6520
6521 static void
6522 do_vec_FDIV (sim_cpu *cpu)
6523 {
6524 /* instr [31] = 0
6525 instr [30] = half(0)/full(1)
6526 instr [29,23] = 10 1110 0
6527 instr [22] = float()/double(1)
6528 instr [21] = 1
6529 instr [20,16] = Vm
6530 instr [15,10] = 1111 11
6531 instr [9, 5] = Vn
6532 instr [4, 0] = Vd. */
6533
6534 unsigned full = INSTR (30, 30);
6535 unsigned vm = INSTR (20, 16);
6536 unsigned vn = INSTR (9, 5);
6537 unsigned vd = INSTR (4, 0);
6538 unsigned i;
6539
6540 NYI_assert (29, 23, 0x5C);
6541 NYI_assert (21, 21, 1);
6542 NYI_assert (15, 10, 0x3F);
6543
6544 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6545 if (INSTR (22, 22))
6546 {
6547 if (! full)
6548 HALT_UNALLOC;
6549
6550 for (i = 0; i < 2; i++)
6551 aarch64_set_vec_double (cpu, vd, i,
6552 aarch64_get_vec_double (cpu, vn, i)
6553 / aarch64_get_vec_double (cpu, vm, i));
6554 }
6555 else
6556 for (i = 0; i < (full ? 4 : 2); i++)
6557 aarch64_set_vec_float (cpu, vd, i,
6558 aarch64_get_vec_float (cpu, vn, i)
6559 / aarch64_get_vec_float (cpu, vm, i));
6560 }
6561
6562 static void
6563 do_vec_FMUL (sim_cpu *cpu)
6564 {
6565 /* instr [31] = 0
6566 instr [30] = half(0)/full(1)
6567 instr [29,23] = 10 1110 0
6568 instr [22] = float(0)/double(1)
6569 instr [21] = 1
6570 instr [20,16] = Vm
6571 instr [15,10] = 1101 11
6572 instr [9, 5] = Vn
6573 instr [4, 0] = Vd. */
6574
6575 unsigned full = INSTR (30, 30);
6576 unsigned vm = INSTR (20, 16);
6577 unsigned vn = INSTR (9, 5);
6578 unsigned vd = INSTR (4, 0);
6579 unsigned i;
6580
6581 NYI_assert (29, 23, 0x5C);
6582 NYI_assert (21, 21, 1);
6583 NYI_assert (15, 10, 0x37);
6584
6585 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6586 if (INSTR (22, 22))
6587 {
6588 if (! full)
6589 HALT_UNALLOC;
6590
6591 for (i = 0; i < 2; i++)
6592 aarch64_set_vec_double (cpu, vd, i,
6593 aarch64_get_vec_double (cpu, vn, i)
6594 * aarch64_get_vec_double (cpu, vm, i));
6595 }
6596 else
6597 for (i = 0; i < (full ? 4 : 2); i++)
6598 aarch64_set_vec_float (cpu, vd, i,
6599 aarch64_get_vec_float (cpu, vn, i)
6600 * aarch64_get_vec_float (cpu, vm, i));
6601 }
6602
6603 static void
6604 do_vec_FADDP (sim_cpu *cpu)
6605 {
6606 /* instr [31] = 0
6607 instr [30] = half(0)/full(1)
6608 instr [29,23] = 10 1110 0
6609 instr [22] = float(0)/double(1)
6610 instr [21] = 1
6611 instr [20,16] = Vm
6612 instr [15,10] = 1101 01
6613 instr [9, 5] = Vn
6614 instr [4, 0] = Vd. */
6615
6616 unsigned full = INSTR (30, 30);
6617 unsigned vm = INSTR (20, 16);
6618 unsigned vn = INSTR (9, 5);
6619 unsigned vd = INSTR (4, 0);
6620
6621 NYI_assert (29, 23, 0x5C);
6622 NYI_assert (21, 21, 1);
6623 NYI_assert (15, 10, 0x35);
6624
6625 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6626 if (INSTR (22, 22))
6627 {
6628 /* Extract values before adding them incase vd == vn/vm. */
6629 double tmp1 = aarch64_get_vec_double (cpu, vn, 0);
6630 double tmp2 = aarch64_get_vec_double (cpu, vn, 1);
6631 double tmp3 = aarch64_get_vec_double (cpu, vm, 0);
6632 double tmp4 = aarch64_get_vec_double (cpu, vm, 1);
6633
6634 if (! full)
6635 HALT_UNALLOC;
6636
6637 aarch64_set_vec_double (cpu, vd, 0, tmp1 + tmp2);
6638 aarch64_set_vec_double (cpu, vd, 1, tmp3 + tmp4);
6639 }
6640 else
6641 {
6642 /* Extract values before adding them incase vd == vn/vm. */
6643 float tmp1 = aarch64_get_vec_float (cpu, vn, 0);
6644 float tmp2 = aarch64_get_vec_float (cpu, vn, 1);
6645 float tmp5 = aarch64_get_vec_float (cpu, vm, 0);
6646 float tmp6 = aarch64_get_vec_float (cpu, vm, 1);
6647
6648 if (full)
6649 {
6650 float tmp3 = aarch64_get_vec_float (cpu, vn, 2);
6651 float tmp4 = aarch64_get_vec_float (cpu, vn, 3);
6652 float tmp7 = aarch64_get_vec_float (cpu, vm, 2);
6653 float tmp8 = aarch64_get_vec_float (cpu, vm, 3);
6654
6655 aarch64_set_vec_float (cpu, vd, 0, tmp1 + tmp2);
6656 aarch64_set_vec_float (cpu, vd, 1, tmp3 + tmp4);
6657 aarch64_set_vec_float (cpu, vd, 2, tmp5 + tmp6);
6658 aarch64_set_vec_float (cpu, vd, 3, tmp7 + tmp8);
6659 }
6660 else
6661 {
6662 aarch64_set_vec_float (cpu, vd, 0, tmp1 + tmp2);
6663 aarch64_set_vec_float (cpu, vd, 1, tmp5 + tmp6);
6664 }
6665 }
6666 }
6667
6668 static void
6669 do_vec_FSQRT (sim_cpu *cpu)
6670 {
6671 /* instr[31] = 0
6672 instr[30] = half(0)/full(1)
6673 instr[29,23] = 10 1110 1
6674 instr[22] = single(0)/double(1)
6675 instr[21,10] = 10 0001 1111 10
6676 instr[9,5] = Vsrc
6677 instr[4,0] = Vdest. */
6678
6679 unsigned vn = INSTR (9, 5);
6680 unsigned vd = INSTR (4, 0);
6681 unsigned full = INSTR (30, 30);
6682 int i;
6683
6684 NYI_assert (29, 23, 0x5D);
6685 NYI_assert (21, 10, 0x87E);
6686
6687 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6688 if (INSTR (22, 22))
6689 {
6690 if (! full)
6691 HALT_UNALLOC;
6692
6693 for (i = 0; i < 2; i++)
6694 aarch64_set_vec_double (cpu, vd, i,
6695 sqrt (aarch64_get_vec_double (cpu, vn, i)));
6696 }
6697 else
6698 {
6699 for (i = 0; i < (full ? 4 : 2); i++)
6700 aarch64_set_vec_float (cpu, vd, i,
6701 sqrtf (aarch64_get_vec_float (cpu, vn, i)));
6702 }
6703 }
6704
6705 static void
6706 do_vec_FNEG (sim_cpu *cpu)
6707 {
6708 /* instr[31] = 0
6709 instr[30] = half (0)/full (1)
6710 instr[29,23] = 10 1110 1
6711 instr[22] = single (0)/double (1)
6712 instr[21,10] = 10 0000 1111 10
6713 instr[9,5] = Vsrc
6714 instr[4,0] = Vdest. */
6715
6716 unsigned vn = INSTR (9, 5);
6717 unsigned vd = INSTR (4, 0);
6718 unsigned full = INSTR (30, 30);
6719 int i;
6720
6721 NYI_assert (29, 23, 0x5D);
6722 NYI_assert (21, 10, 0x83E);
6723
6724 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6725 if (INSTR (22, 22))
6726 {
6727 if (! full)
6728 HALT_UNALLOC;
6729
6730 for (i = 0; i < 2; i++)
6731 aarch64_set_vec_double (cpu, vd, i,
6732 - aarch64_get_vec_double (cpu, vn, i));
6733 }
6734 else
6735 {
6736 for (i = 0; i < (full ? 4 : 2); i++)
6737 aarch64_set_vec_float (cpu, vd, i,
6738 - aarch64_get_vec_float (cpu, vn, i));
6739 }
6740 }
6741
6742 static void
6743 do_vec_NOT (sim_cpu *cpu)
6744 {
6745 /* instr[31] = 0
6746 instr[30] = half (0)/full (1)
6747 instr[29,10] = 10 1110 0010 0000 0101 10
6748 instr[9,5] = Vn
6749 instr[4.0] = Vd. */
6750
6751 unsigned vn = INSTR (9, 5);
6752 unsigned vd = INSTR (4, 0);
6753 unsigned i;
6754 int full = INSTR (30, 30);
6755
6756 NYI_assert (29, 10, 0xB8816);
6757
6758 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6759 for (i = 0; i < (full ? 16 : 8); i++)
6760 aarch64_set_vec_u8 (cpu, vd, i, ~ aarch64_get_vec_u8 (cpu, vn, i));
6761 }
6762
6763 static unsigned int
6764 clz (uint64_t val, unsigned size)
6765 {
6766 uint64_t mask = 1;
6767 int count;
6768
6769 mask <<= (size - 1);
6770 count = 0;
6771 do
6772 {
6773 if (val & mask)
6774 break;
6775 mask >>= 1;
6776 count ++;
6777 }
6778 while (mask);
6779
6780 return count;
6781 }
6782
6783 static void
6784 do_vec_CLZ (sim_cpu *cpu)
6785 {
6786 /* instr[31] = 0
6787 instr[30] = half (0)/full (1)
6788 instr[29,24] = 10 1110
6789 instr[23,22] = size
6790 instr[21,10] = 10 0000 0100 10
6791 instr[9,5] = Vn
6792 instr[4.0] = Vd. */
6793
6794 unsigned vn = INSTR (9, 5);
6795 unsigned vd = INSTR (4, 0);
6796 unsigned i;
6797 int full = INSTR (30,30);
6798
6799 NYI_assert (29, 24, 0x2E);
6800 NYI_assert (21, 10, 0x812);
6801
6802 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6803 switch (INSTR (23, 22))
6804 {
6805 case 0:
6806 for (i = 0; i < (full ? 16 : 8); i++)
6807 aarch64_set_vec_u8 (cpu, vd, i, clz (aarch64_get_vec_u8 (cpu, vn, i), 8));
6808 break;
6809 case 1:
6810 for (i = 0; i < (full ? 8 : 4); i++)
6811 aarch64_set_vec_u16 (cpu, vd, i, clz (aarch64_get_vec_u16 (cpu, vn, i), 16));
6812 break;
6813 case 2:
6814 for (i = 0; i < (full ? 4 : 2); i++)
6815 aarch64_set_vec_u32 (cpu, vd, i, clz (aarch64_get_vec_u32 (cpu, vn, i), 32));
6816 break;
6817 case 3:
6818 if (! full)
6819 HALT_UNALLOC;
6820 aarch64_set_vec_u64 (cpu, vd, 0, clz (aarch64_get_vec_u64 (cpu, vn, 0), 64));
6821 aarch64_set_vec_u64 (cpu, vd, 1, clz (aarch64_get_vec_u64 (cpu, vn, 1), 64));
6822 break;
6823 }
6824 }
6825
6826 static void
6827 do_vec_MOV_element (sim_cpu *cpu)
6828 {
6829 /* instr[31,21] = 0110 1110 000
6830 instr[20,16] = size & dest index
6831 instr[15] = 0
6832 instr[14,11] = source index
6833 instr[10] = 1
6834 instr[9,5] = Vs
6835 instr[4.0] = Vd. */
6836
6837 unsigned vs = INSTR (9, 5);
6838 unsigned vd = INSTR (4, 0);
6839 unsigned src_index;
6840 unsigned dst_index;
6841
6842 NYI_assert (31, 21, 0x370);
6843 NYI_assert (15, 15, 0);
6844 NYI_assert (10, 10, 1);
6845
6846 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6847 if (INSTR (16, 16))
6848 {
6849 /* Move a byte. */
6850 src_index = INSTR (14, 11);
6851 dst_index = INSTR (20, 17);
6852 aarch64_set_vec_u8 (cpu, vd, dst_index,
6853 aarch64_get_vec_u8 (cpu, vs, src_index));
6854 }
6855 else if (INSTR (17, 17))
6856 {
6857 /* Move 16-bits. */
6858 NYI_assert (11, 11, 0);
6859 src_index = INSTR (14, 12);
6860 dst_index = INSTR (20, 18);
6861 aarch64_set_vec_u16 (cpu, vd, dst_index,
6862 aarch64_get_vec_u16 (cpu, vs, src_index));
6863 }
6864 else if (INSTR (18, 18))
6865 {
6866 /* Move 32-bits. */
6867 NYI_assert (12, 11, 0);
6868 src_index = INSTR (14, 13);
6869 dst_index = INSTR (20, 19);
6870 aarch64_set_vec_u32 (cpu, vd, dst_index,
6871 aarch64_get_vec_u32 (cpu, vs, src_index));
6872 }
6873 else
6874 {
6875 NYI_assert (19, 19, 1);
6876 NYI_assert (13, 11, 0);
6877 src_index = INSTR (14, 14);
6878 dst_index = INSTR (20, 20);
6879 aarch64_set_vec_u64 (cpu, vd, dst_index,
6880 aarch64_get_vec_u64 (cpu, vs, src_index));
6881 }
6882 }
6883
6884 static void
6885 do_vec_REV32 (sim_cpu *cpu)
6886 {
6887 /* instr[31] = 0
6888 instr[30] = full/half
6889 instr[29,24] = 10 1110
6890 instr[23,22] = size
6891 instr[21,10] = 10 0000 0000 10
6892 instr[9,5] = Rn
6893 instr[4,0] = Rd. */
6894
6895 unsigned rn = INSTR (9, 5);
6896 unsigned rd = INSTR (4, 0);
6897 unsigned size = INSTR (23, 22);
6898 unsigned full = INSTR (30, 30);
6899 unsigned i;
6900 FRegister val;
6901
6902 NYI_assert (29, 24, 0x2E);
6903 NYI_assert (21, 10, 0x802);
6904
6905 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6906 switch (size)
6907 {
6908 case 0:
6909 for (i = 0; i < (full ? 16 : 8); i++)
6910 val.b[i ^ 0x3] = aarch64_get_vec_u8 (cpu, rn, i);
6911 break;
6912
6913 case 1:
6914 for (i = 0; i < (full ? 8 : 4); i++)
6915 val.h[i ^ 0x1] = aarch64_get_vec_u16 (cpu, rn, i);
6916 break;
6917
6918 default:
6919 HALT_UNALLOC;
6920 }
6921
6922 aarch64_set_vec_u64 (cpu, rd, 0, val.v[0]);
6923 if (full)
6924 aarch64_set_vec_u64 (cpu, rd, 1, val.v[1]);
6925 }
6926
6927 static void
6928 do_vec_EXT (sim_cpu *cpu)
6929 {
6930 /* instr[31] = 0
6931 instr[30] = full/half
6932 instr[29,21] = 10 1110 000
6933 instr[20,16] = Vm
6934 instr[15] = 0
6935 instr[14,11] = source index
6936 instr[10] = 0
6937 instr[9,5] = Vn
6938 instr[4.0] = Vd. */
6939
6940 unsigned vm = INSTR (20, 16);
6941 unsigned vn = INSTR (9, 5);
6942 unsigned vd = INSTR (4, 0);
6943 unsigned src_index = INSTR (14, 11);
6944 unsigned full = INSTR (30, 30);
6945 unsigned i;
6946 unsigned j;
6947 FRegister val;
6948
6949 NYI_assert (31, 21, 0x370);
6950 NYI_assert (15, 15, 0);
6951 NYI_assert (10, 10, 0);
6952
6953 if (!full && (src_index & 0x8))
6954 HALT_UNALLOC;
6955
6956 j = 0;
6957
6958 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
6959 for (i = src_index; i < (full ? 16 : 8); i++)
6960 val.b[j ++] = aarch64_get_vec_u8 (cpu, vn, i);
6961 for (i = 0; i < src_index; i++)
6962 val.b[j ++] = aarch64_get_vec_u8 (cpu, vm, i);
6963
6964 aarch64_set_vec_u64 (cpu, vd, 0, val.v[0]);
6965 if (full)
6966 aarch64_set_vec_u64 (cpu, vd, 1, val.v[1]);
6967 }
6968
6969 static void
6970 dexAdvSIMD0 (sim_cpu *cpu)
6971 {
6972 /* instr [28,25] = 0 111. */
6973 if ( INSTR (15, 10) == 0x07
6974 && (INSTR (9, 5) ==
6975 INSTR (20, 16)))
6976 {
6977 if (INSTR (31, 21) == 0x075
6978 || INSTR (31, 21) == 0x275)
6979 {
6980 do_vec_MOV_whole_vector (cpu);
6981 return;
6982 }
6983 }
6984
6985 if (INSTR (29, 19) == 0x1E0)
6986 {
6987 do_vec_MOV_immediate (cpu);
6988 return;
6989 }
6990
6991 if (INSTR (29, 19) == 0x5E0)
6992 {
6993 do_vec_MVNI (cpu);
6994 return;
6995 }
6996
6997 if (INSTR (29, 19) == 0x1C0
6998 || INSTR (29, 19) == 0x1C1)
6999 {
7000 if (INSTR (15, 10) == 0x03)
7001 {
7002 do_vec_DUP_scalar_into_vector (cpu);
7003 return;
7004 }
7005 }
7006
7007 switch (INSTR (29, 24))
7008 {
7009 case 0x0E: do_vec_op1 (cpu); return;
7010 case 0x0F: do_vec_op2 (cpu); return;
7011
7012 case 0x2E:
7013 if (INSTR (21, 21) == 1)
7014 {
7015 switch (INSTR (15, 10))
7016 {
7017 case 0x02:
7018 do_vec_REV32 (cpu);
7019 return;
7020
7021 case 0x07:
7022 switch (INSTR (23, 22))
7023 {
7024 case 0: do_vec_EOR (cpu); return;
7025 case 1: do_vec_BSL (cpu); return;
7026 case 2:
7027 case 3: do_vec_bit (cpu); return;
7028 }
7029 break;
7030
7031 case 0x08: do_vec_sub_long (cpu); return;
7032 case 0x11: do_vec_USHL (cpu); return;
7033 case 0x12: do_vec_CLZ (cpu); return;
7034 case 0x16: do_vec_NOT (cpu); return;
7035 case 0x19: do_vec_max (cpu); return;
7036 case 0x1B: do_vec_min (cpu); return;
7037 case 0x21: do_vec_SUB (cpu); return;
7038 case 0x25: do_vec_MLS (cpu); return;
7039 case 0x31: do_vec_FminmaxNMP (cpu); return;
7040 case 0x35: do_vec_FADDP (cpu); return;
7041 case 0x37: do_vec_FMUL (cpu); return;
7042 case 0x3F: do_vec_FDIV (cpu); return;
7043
7044 case 0x3E:
7045 switch (INSTR (20, 16))
7046 {
7047 case 0x00: do_vec_FNEG (cpu); return;
7048 case 0x01: do_vec_FSQRT (cpu); return;
7049 default: HALT_NYI;
7050 }
7051
7052 case 0x0D:
7053 case 0x0F:
7054 case 0x22:
7055 case 0x23:
7056 case 0x26:
7057 case 0x2A:
7058 case 0x32:
7059 case 0x36:
7060 case 0x39:
7061 case 0x3A:
7062 do_vec_compare (cpu); return;
7063
7064 default:
7065 break;
7066 }
7067 }
7068
7069 if (INSTR (31, 21) == 0x370)
7070 {
7071 if (INSTR (10, 10))
7072 do_vec_MOV_element (cpu);
7073 else
7074 do_vec_EXT (cpu);
7075 return;
7076 }
7077
7078 switch (INSTR (21, 10))
7079 {
7080 case 0x82E: do_vec_neg (cpu); return;
7081 case 0x87E: do_vec_sqrt (cpu); return;
7082 default:
7083 if (INSTR (15, 10) == 0x30)
7084 {
7085 do_vec_mull (cpu);
7086 return;
7087 }
7088 break;
7089 }
7090 break;
7091
7092 case 0x2f:
7093 switch (INSTR (15, 10))
7094 {
7095 case 0x01: do_vec_SSHR_USHR (cpu); return;
7096 case 0x10:
7097 case 0x12: do_vec_mls_indexed (cpu); return;
7098 case 0x29: do_vec_xtl (cpu); return;
7099 default:
7100 HALT_NYI;
7101 }
7102
7103 default:
7104 break;
7105 }
7106
7107 HALT_NYI;
7108 }
7109
7110 /* 3 sources. */
7111
7112 /* Float multiply add. */
7113 static void
7114 fmadds (sim_cpu *cpu)
7115 {
7116 unsigned sa = INSTR (14, 10);
7117 unsigned sm = INSTR (20, 16);
7118 unsigned sn = INSTR ( 9, 5);
7119 unsigned sd = INSTR ( 4, 0);
7120
7121 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7122 aarch64_set_FP_float (cpu, sd, aarch64_get_FP_float (cpu, sa)
7123 + aarch64_get_FP_float (cpu, sn)
7124 * aarch64_get_FP_float (cpu, sm));
7125 }
7126
7127 /* Double multiply add. */
7128 static void
7129 fmaddd (sim_cpu *cpu)
7130 {
7131 unsigned sa = INSTR (14, 10);
7132 unsigned sm = INSTR (20, 16);
7133 unsigned sn = INSTR ( 9, 5);
7134 unsigned sd = INSTR ( 4, 0);
7135
7136 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7137 aarch64_set_FP_double (cpu, sd, aarch64_get_FP_double (cpu, sa)
7138 + aarch64_get_FP_double (cpu, sn)
7139 * aarch64_get_FP_double (cpu, sm));
7140 }
7141
7142 /* Float multiply subtract. */
7143 static void
7144 fmsubs (sim_cpu *cpu)
7145 {
7146 unsigned sa = INSTR (14, 10);
7147 unsigned sm = INSTR (20, 16);
7148 unsigned sn = INSTR ( 9, 5);
7149 unsigned sd = INSTR ( 4, 0);
7150
7151 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7152 aarch64_set_FP_float (cpu, sd, aarch64_get_FP_float (cpu, sa)
7153 - aarch64_get_FP_float (cpu, sn)
7154 * aarch64_get_FP_float (cpu, sm));
7155 }
7156
7157 /* Double multiply subtract. */
7158 static void
7159 fmsubd (sim_cpu *cpu)
7160 {
7161 unsigned sa = INSTR (14, 10);
7162 unsigned sm = INSTR (20, 16);
7163 unsigned sn = INSTR ( 9, 5);
7164 unsigned sd = INSTR ( 4, 0);
7165
7166 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7167 aarch64_set_FP_double (cpu, sd, aarch64_get_FP_double (cpu, sa)
7168 - aarch64_get_FP_double (cpu, sn)
7169 * aarch64_get_FP_double (cpu, sm));
7170 }
7171
7172 /* Float negative multiply add. */
7173 static void
7174 fnmadds (sim_cpu *cpu)
7175 {
7176 unsigned sa = INSTR (14, 10);
7177 unsigned sm = INSTR (20, 16);
7178 unsigned sn = INSTR ( 9, 5);
7179 unsigned sd = INSTR ( 4, 0);
7180
7181 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7182 aarch64_set_FP_float (cpu, sd, - aarch64_get_FP_float (cpu, sa)
7183 + (- aarch64_get_FP_float (cpu, sn))
7184 * aarch64_get_FP_float (cpu, sm));
7185 }
7186
7187 /* Double negative multiply add. */
7188 static void
7189 fnmaddd (sim_cpu *cpu)
7190 {
7191 unsigned sa = INSTR (14, 10);
7192 unsigned sm = INSTR (20, 16);
7193 unsigned sn = INSTR ( 9, 5);
7194 unsigned sd = INSTR ( 4, 0);
7195
7196 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7197 aarch64_set_FP_double (cpu, sd, - aarch64_get_FP_double (cpu, sa)
7198 + (- aarch64_get_FP_double (cpu, sn))
7199 * aarch64_get_FP_double (cpu, sm));
7200 }
7201
7202 /* Float negative multiply subtract. */
7203 static void
7204 fnmsubs (sim_cpu *cpu)
7205 {
7206 unsigned sa = INSTR (14, 10);
7207 unsigned sm = INSTR (20, 16);
7208 unsigned sn = INSTR ( 9, 5);
7209 unsigned sd = INSTR ( 4, 0);
7210
7211 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7212 aarch64_set_FP_float (cpu, sd, - aarch64_get_FP_float (cpu, sa)
7213 + aarch64_get_FP_float (cpu, sn)
7214 * aarch64_get_FP_float (cpu, sm));
7215 }
7216
7217 /* Double negative multiply subtract. */
7218 static void
7219 fnmsubd (sim_cpu *cpu)
7220 {
7221 unsigned sa = INSTR (14, 10);
7222 unsigned sm = INSTR (20, 16);
7223 unsigned sn = INSTR ( 9, 5);
7224 unsigned sd = INSTR ( 4, 0);
7225
7226 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7227 aarch64_set_FP_double (cpu, sd, - aarch64_get_FP_double (cpu, sa)
7228 + aarch64_get_FP_double (cpu, sn)
7229 * aarch64_get_FP_double (cpu, sm));
7230 }
7231
7232 static void
7233 dexSimpleFPDataProc3Source (sim_cpu *cpu)
7234 {
7235 /* instr[31] ==> M : 0 ==> OK, 1 ==> UNALLOC
7236 instr[30] = 0
7237 instr[29] ==> S : 0 ==> OK, 1 ==> UNALLOC
7238 instr[28,25] = 1111
7239 instr[24] = 1
7240 instr[23,22] ==> type : 0 ==> single, 01 ==> double, 1x ==> UNALLOC
7241 instr[21] ==> o1 : 0 ==> unnegated, 1 ==> negated
7242 instr[15] ==> o2 : 0 ==> ADD, 1 ==> SUB */
7243
7244 uint32_t M_S = (INSTR (31, 31) << 1) | INSTR (29, 29);
7245 /* dispatch on combined type:o1:o2. */
7246 uint32_t dispatch = (INSTR (23, 21) << 1) | INSTR (15, 15);
7247
7248 if (M_S != 0)
7249 HALT_UNALLOC;
7250
7251 switch (dispatch)
7252 {
7253 case 0: fmadds (cpu); return;
7254 case 1: fmsubs (cpu); return;
7255 case 2: fnmadds (cpu); return;
7256 case 3: fnmsubs (cpu); return;
7257 case 4: fmaddd (cpu); return;
7258 case 5: fmsubd (cpu); return;
7259 case 6: fnmaddd (cpu); return;
7260 case 7: fnmsubd (cpu); return;
7261 default:
7262 /* type > 1 is currently unallocated. */
7263 HALT_UNALLOC;
7264 }
7265 }
7266
7267 static void
7268 dexSimpleFPFixedConvert (sim_cpu *cpu)
7269 {
7270 HALT_NYI;
7271 }
7272
7273 static void
7274 dexSimpleFPCondCompare (sim_cpu *cpu)
7275 {
7276 /* instr [31,23] = 0001 1110 0
7277 instr [22] = type
7278 instr [21] = 1
7279 instr [20,16] = Rm
7280 instr [15,12] = condition
7281 instr [11,10] = 01
7282 instr [9,5] = Rn
7283 instr [4] = 0
7284 instr [3,0] = nzcv */
7285
7286 unsigned rm = INSTR (20, 16);
7287 unsigned rn = INSTR (9, 5);
7288
7289 NYI_assert (31, 23, 0x3C);
7290 NYI_assert (11, 10, 0x1);
7291 NYI_assert (4, 4, 0);
7292
7293 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7294 if (! testConditionCode (cpu, INSTR (15, 12)))
7295 {
7296 aarch64_set_CPSR (cpu, INSTR (3, 0));
7297 return;
7298 }
7299
7300 if (INSTR (22, 22))
7301 {
7302 /* Double precision. */
7303 double val1 = aarch64_get_vec_double (cpu, rn, 0);
7304 double val2 = aarch64_get_vec_double (cpu, rm, 0);
7305
7306 /* FIXME: Check for NaNs. */
7307 if (val1 == val2)
7308 aarch64_set_CPSR (cpu, (Z | C));
7309 else if (val1 < val2)
7310 aarch64_set_CPSR (cpu, N);
7311 else /* val1 > val2 */
7312 aarch64_set_CPSR (cpu, C);
7313 }
7314 else
7315 {
7316 /* Single precision. */
7317 float val1 = aarch64_get_vec_float (cpu, rn, 0);
7318 float val2 = aarch64_get_vec_float (cpu, rm, 0);
7319
7320 /* FIXME: Check for NaNs. */
7321 if (val1 == val2)
7322 aarch64_set_CPSR (cpu, (Z | C));
7323 else if (val1 < val2)
7324 aarch64_set_CPSR (cpu, N);
7325 else /* val1 > val2 */
7326 aarch64_set_CPSR (cpu, C);
7327 }
7328 }
7329
7330 /* 2 sources. */
7331
7332 /* Float add. */
7333 static void
7334 fadds (sim_cpu *cpu)
7335 {
7336 unsigned sm = INSTR (20, 16);
7337 unsigned sn = INSTR ( 9, 5);
7338 unsigned sd = INSTR ( 4, 0);
7339
7340 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7341 aarch64_set_FP_float (cpu, sd, aarch64_get_FP_float (cpu, sn)
7342 + aarch64_get_FP_float (cpu, sm));
7343 }
7344
7345 /* Double add. */
7346 static void
7347 faddd (sim_cpu *cpu)
7348 {
7349 unsigned sm = INSTR (20, 16);
7350 unsigned sn = INSTR ( 9, 5);
7351 unsigned sd = INSTR ( 4, 0);
7352
7353 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7354 aarch64_set_FP_double (cpu, sd, aarch64_get_FP_double (cpu, sn)
7355 + aarch64_get_FP_double (cpu, sm));
7356 }
7357
7358 /* Float divide. */
7359 static void
7360 fdivs (sim_cpu *cpu)
7361 {
7362 unsigned sm = INSTR (20, 16);
7363 unsigned sn = INSTR ( 9, 5);
7364 unsigned sd = INSTR ( 4, 0);
7365
7366 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7367 aarch64_set_FP_float (cpu, sd, aarch64_get_FP_float (cpu, sn)
7368 / aarch64_get_FP_float (cpu, sm));
7369 }
7370
7371 /* Double divide. */
7372 static void
7373 fdivd (sim_cpu *cpu)
7374 {
7375 unsigned sm = INSTR (20, 16);
7376 unsigned sn = INSTR ( 9, 5);
7377 unsigned sd = INSTR ( 4, 0);
7378
7379 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7380 aarch64_set_FP_double (cpu, sd, aarch64_get_FP_double (cpu, sn)
7381 / aarch64_get_FP_double (cpu, sm));
7382 }
7383
7384 /* Float multiply. */
7385 static void
7386 fmuls (sim_cpu *cpu)
7387 {
7388 unsigned sm = INSTR (20, 16);
7389 unsigned sn = INSTR ( 9, 5);
7390 unsigned sd = INSTR ( 4, 0);
7391
7392 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7393 aarch64_set_FP_float (cpu, sd, aarch64_get_FP_float (cpu, sn)
7394 * aarch64_get_FP_float (cpu, sm));
7395 }
7396
7397 /* Double multiply. */
7398 static void
7399 fmuld (sim_cpu *cpu)
7400 {
7401 unsigned sm = INSTR (20, 16);
7402 unsigned sn = INSTR ( 9, 5);
7403 unsigned sd = INSTR ( 4, 0);
7404
7405 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7406 aarch64_set_FP_double (cpu, sd, aarch64_get_FP_double (cpu, sn)
7407 * aarch64_get_FP_double (cpu, sm));
7408 }
7409
7410 /* Float negate and multiply. */
7411 static void
7412 fnmuls (sim_cpu *cpu)
7413 {
7414 unsigned sm = INSTR (20, 16);
7415 unsigned sn = INSTR ( 9, 5);
7416 unsigned sd = INSTR ( 4, 0);
7417
7418 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7419 aarch64_set_FP_float (cpu, sd, - (aarch64_get_FP_float (cpu, sn)
7420 * aarch64_get_FP_float (cpu, sm)));
7421 }
7422
7423 /* Double negate and multiply. */
7424 static void
7425 fnmuld (sim_cpu *cpu)
7426 {
7427 unsigned sm = INSTR (20, 16);
7428 unsigned sn = INSTR ( 9, 5);
7429 unsigned sd = INSTR ( 4, 0);
7430
7431 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7432 aarch64_set_FP_double (cpu, sd, - (aarch64_get_FP_double (cpu, sn)
7433 * aarch64_get_FP_double (cpu, sm)));
7434 }
7435
7436 /* Float subtract. */
7437 static void
7438 fsubs (sim_cpu *cpu)
7439 {
7440 unsigned sm = INSTR (20, 16);
7441 unsigned sn = INSTR ( 9, 5);
7442 unsigned sd = INSTR ( 4, 0);
7443
7444 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7445 aarch64_set_FP_float (cpu, sd, aarch64_get_FP_float (cpu, sn)
7446 - aarch64_get_FP_float (cpu, sm));
7447 }
7448
7449 /* Double subtract. */
7450 static void
7451 fsubd (sim_cpu *cpu)
7452 {
7453 unsigned sm = INSTR (20, 16);
7454 unsigned sn = INSTR ( 9, 5);
7455 unsigned sd = INSTR ( 4, 0);
7456
7457 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7458 aarch64_set_FP_double (cpu, sd, aarch64_get_FP_double (cpu, sn)
7459 - aarch64_get_FP_double (cpu, sm));
7460 }
7461
7462 static void
7463 do_FMINNM (sim_cpu *cpu)
7464 {
7465 /* instr[31,23] = 0 0011 1100
7466 instr[22] = float(0)/double(1)
7467 instr[21] = 1
7468 instr[20,16] = Sm
7469 instr[15,10] = 01 1110
7470 instr[9,5] = Sn
7471 instr[4,0] = Cpu */
7472
7473 unsigned sm = INSTR (20, 16);
7474 unsigned sn = INSTR ( 9, 5);
7475 unsigned sd = INSTR ( 4, 0);
7476
7477 NYI_assert (31, 23, 0x03C);
7478 NYI_assert (15, 10, 0x1E);
7479
7480 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7481 if (INSTR (22, 22))
7482 aarch64_set_FP_double (cpu, sd,
7483 dminnm (aarch64_get_FP_double (cpu, sn),
7484 aarch64_get_FP_double (cpu, sm)));
7485 else
7486 aarch64_set_FP_float (cpu, sd,
7487 fminnm (aarch64_get_FP_float (cpu, sn),
7488 aarch64_get_FP_float (cpu, sm)));
7489 }
7490
7491 static void
7492 do_FMAXNM (sim_cpu *cpu)
7493 {
7494 /* instr[31,23] = 0 0011 1100
7495 instr[22] = float(0)/double(1)
7496 instr[21] = 1
7497 instr[20,16] = Sm
7498 instr[15,10] = 01 1010
7499 instr[9,5] = Sn
7500 instr[4,0] = Cpu */
7501
7502 unsigned sm = INSTR (20, 16);
7503 unsigned sn = INSTR ( 9, 5);
7504 unsigned sd = INSTR ( 4, 0);
7505
7506 NYI_assert (31, 23, 0x03C);
7507 NYI_assert (15, 10, 0x1A);
7508
7509 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7510 if (INSTR (22, 22))
7511 aarch64_set_FP_double (cpu, sd,
7512 dmaxnm (aarch64_get_FP_double (cpu, sn),
7513 aarch64_get_FP_double (cpu, sm)));
7514 else
7515 aarch64_set_FP_float (cpu, sd,
7516 fmaxnm (aarch64_get_FP_float (cpu, sn),
7517 aarch64_get_FP_float (cpu, sm)));
7518 }
7519
7520 static void
7521 dexSimpleFPDataProc2Source (sim_cpu *cpu)
7522 {
7523 /* instr[31] ==> M : 0 ==> OK, 1 ==> UNALLOC
7524 instr[30] = 0
7525 instr[29] ==> S : 0 ==> OK, 1 ==> UNALLOC
7526 instr[28,25] = 1111
7527 instr[24] = 0
7528 instr[23,22] ==> type : 0 ==> single, 01 ==> double, 1x ==> UNALLOC
7529 instr[21] = 1
7530 instr[20,16] = Vm
7531 instr[15,12] ==> opcode : 0000 ==> FMUL, 0001 ==> FDIV
7532 0010 ==> FADD, 0011 ==> FSUB,
7533 0100 ==> FMAX, 0101 ==> FMIN
7534 0110 ==> FMAXNM, 0111 ==> FMINNM
7535 1000 ==> FNMUL, ow ==> UNALLOC
7536 instr[11,10] = 10
7537 instr[9,5] = Vn
7538 instr[4,0] = Vd */
7539
7540 uint32_t M_S = (INSTR (31, 31) << 1) | INSTR (29, 29);
7541 uint32_t type = INSTR (23, 22);
7542 /* Dispatch on opcode. */
7543 uint32_t dispatch = INSTR (15, 12);
7544
7545 if (type > 1)
7546 HALT_UNALLOC;
7547
7548 if (M_S != 0)
7549 HALT_UNALLOC;
7550
7551 if (type)
7552 switch (dispatch)
7553 {
7554 case 0: fmuld (cpu); return;
7555 case 1: fdivd (cpu); return;
7556 case 2: faddd (cpu); return;
7557 case 3: fsubd (cpu); return;
7558 case 6: do_FMAXNM (cpu); return;
7559 case 7: do_FMINNM (cpu); return;
7560 case 8: fnmuld (cpu); return;
7561
7562 /* Have not yet implemented fmax and fmin. */
7563 case 4:
7564 case 5:
7565 HALT_NYI;
7566
7567 default:
7568 HALT_UNALLOC;
7569 }
7570 else /* type == 0 => floats. */
7571 switch (dispatch)
7572 {
7573 case 0: fmuls (cpu); return;
7574 case 1: fdivs (cpu); return;
7575 case 2: fadds (cpu); return;
7576 case 3: fsubs (cpu); return;
7577 case 6: do_FMAXNM (cpu); return;
7578 case 7: do_FMINNM (cpu); return;
7579 case 8: fnmuls (cpu); return;
7580
7581 case 4:
7582 case 5:
7583 HALT_NYI;
7584
7585 default:
7586 HALT_UNALLOC;
7587 }
7588 }
7589
7590 static void
7591 dexSimpleFPCondSelect (sim_cpu *cpu)
7592 {
7593 /* FCSEL
7594 instr[31,23] = 0 0011 1100
7595 instr[22] = 0=>single 1=>double
7596 instr[21] = 1
7597 instr[20,16] = Sm
7598 instr[15,12] = cond
7599 instr[11,10] = 11
7600 instr[9,5] = Sn
7601 instr[4,0] = Cpu */
7602 unsigned sm = INSTR (20, 16);
7603 unsigned sn = INSTR ( 9, 5);
7604 unsigned sd = INSTR ( 4, 0);
7605 uint32_t set = testConditionCode (cpu, INSTR (15, 12));
7606
7607 NYI_assert (31, 23, 0x03C);
7608 NYI_assert (11, 10, 0x3);
7609
7610 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7611 if (INSTR (22, 22))
7612 aarch64_set_FP_double (cpu, sd, (set ? aarch64_get_FP_double (cpu, sn)
7613 : aarch64_get_FP_double (cpu, sm)));
7614 else
7615 aarch64_set_FP_float (cpu, sd, (set ? aarch64_get_FP_float (cpu, sn)
7616 : aarch64_get_FP_float (cpu, sm)));
7617 }
7618
7619 /* Store 32 bit unscaled signed 9 bit. */
7620 static void
7621 fsturs (sim_cpu *cpu, int32_t offset)
7622 {
7623 unsigned int rn = INSTR (9, 5);
7624 unsigned int st = INSTR (4, 0);
7625
7626 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7627 aarch64_set_mem_u32 (cpu, aarch64_get_reg_u64 (cpu, rn, 1) + offset,
7628 aarch64_get_vec_u32 (cpu, st, 0));
7629 }
7630
7631 /* Store 64 bit unscaled signed 9 bit. */
7632 static void
7633 fsturd (sim_cpu *cpu, int32_t offset)
7634 {
7635 unsigned int rn = INSTR (9, 5);
7636 unsigned int st = INSTR (4, 0);
7637
7638 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7639 aarch64_set_mem_u64 (cpu, aarch64_get_reg_u64 (cpu, rn, 1) + offset,
7640 aarch64_get_vec_u64 (cpu, st, 0));
7641 }
7642
7643 /* Store 128 bit unscaled signed 9 bit. */
7644 static void
7645 fsturq (sim_cpu *cpu, int32_t offset)
7646 {
7647 unsigned int rn = INSTR (9, 5);
7648 unsigned int st = INSTR (4, 0);
7649 FRegister a;
7650
7651 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7652 aarch64_get_FP_long_double (cpu, st, & a);
7653 aarch64_set_mem_long_double (cpu,
7654 aarch64_get_reg_u64 (cpu, rn, 1)
7655 + offset, a);
7656 }
7657
7658 /* TODO FP move register. */
7659
7660 /* 32 bit fp to fp move register. */
7661 static void
7662 ffmovs (sim_cpu *cpu)
7663 {
7664 unsigned int rn = INSTR (9, 5);
7665 unsigned int st = INSTR (4, 0);
7666
7667 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7668 aarch64_set_FP_float (cpu, st, aarch64_get_FP_float (cpu, rn));
7669 }
7670
7671 /* 64 bit fp to fp move register. */
7672 static void
7673 ffmovd (sim_cpu *cpu)
7674 {
7675 unsigned int rn = INSTR (9, 5);
7676 unsigned int st = INSTR (4, 0);
7677
7678 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7679 aarch64_set_FP_double (cpu, st, aarch64_get_FP_double (cpu, rn));
7680 }
7681
7682 /* 32 bit GReg to Vec move register. */
7683 static void
7684 fgmovs (sim_cpu *cpu)
7685 {
7686 unsigned int rn = INSTR (9, 5);
7687 unsigned int st = INSTR (4, 0);
7688
7689 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7690 aarch64_set_vec_u32 (cpu, st, 0, aarch64_get_reg_u32 (cpu, rn, NO_SP));
7691 }
7692
7693 /* 64 bit g to fp move register. */
7694 static void
7695 fgmovd (sim_cpu *cpu)
7696 {
7697 unsigned int rn = INSTR (9, 5);
7698 unsigned int st = INSTR (4, 0);
7699
7700 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7701 aarch64_set_vec_u64 (cpu, st, 0, aarch64_get_reg_u64 (cpu, rn, NO_SP));
7702 }
7703
7704 /* 32 bit fp to g move register. */
7705 static void
7706 gfmovs (sim_cpu *cpu)
7707 {
7708 unsigned int rn = INSTR (9, 5);
7709 unsigned int st = INSTR (4, 0);
7710
7711 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7712 aarch64_set_reg_u64 (cpu, st, NO_SP, aarch64_get_vec_u32 (cpu, rn, 0));
7713 }
7714
7715 /* 64 bit fp to g move register. */
7716 static void
7717 gfmovd (sim_cpu *cpu)
7718 {
7719 unsigned int rn = INSTR (9, 5);
7720 unsigned int st = INSTR (4, 0);
7721
7722 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7723 aarch64_set_reg_u64 (cpu, st, NO_SP, aarch64_get_vec_u64 (cpu, rn, 0));
7724 }
7725
7726 /* FP move immediate
7727
7728 These install an immediate 8 bit value in the target register
7729 where the 8 bits comprise 1 sign bit, 4 bits of fraction and a 3
7730 bit exponent. */
7731
7732 static void
7733 fmovs (sim_cpu *cpu)
7734 {
7735 unsigned int sd = INSTR (4, 0);
7736 uint32_t imm = INSTR (20, 13);
7737 float f = fp_immediate_for_encoding_32 (imm);
7738
7739 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7740 aarch64_set_FP_float (cpu, sd, f);
7741 }
7742
7743 static void
7744 fmovd (sim_cpu *cpu)
7745 {
7746 unsigned int sd = INSTR (4, 0);
7747 uint32_t imm = INSTR (20, 13);
7748 double d = fp_immediate_for_encoding_64 (imm);
7749
7750 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7751 aarch64_set_FP_double (cpu, sd, d);
7752 }
7753
7754 static void
7755 dexSimpleFPImmediate (sim_cpu *cpu)
7756 {
7757 /* instr[31,23] == 00111100
7758 instr[22] == type : single(0)/double(1)
7759 instr[21] == 1
7760 instr[20,13] == imm8
7761 instr[12,10] == 100
7762 instr[9,5] == imm5 : 00000 ==> PK, ow ==> UNALLOC
7763 instr[4,0] == Rd */
7764 uint32_t imm5 = INSTR (9, 5);
7765
7766 NYI_assert (31, 23, 0x3C);
7767
7768 if (imm5 != 0)
7769 HALT_UNALLOC;
7770
7771 if (INSTR (22, 22))
7772 fmovd (cpu);
7773 else
7774 fmovs (cpu);
7775 }
7776
7777 /* TODO specific decode and execute for group Load Store. */
7778
7779 /* TODO FP load/store single register (unscaled offset). */
7780
7781 /* TODO load 8 bit unscaled signed 9 bit. */
7782 /* TODO load 16 bit unscaled signed 9 bit. */
7783
7784 /* Load 32 bit unscaled signed 9 bit. */
7785 static void
7786 fldurs (sim_cpu *cpu, int32_t offset)
7787 {
7788 unsigned int rn = INSTR (9, 5);
7789 unsigned int st = INSTR (4, 0);
7790
7791 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7792 aarch64_set_vec_u32 (cpu, st, 0, aarch64_get_mem_u32
7793 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset));
7794 }
7795
7796 /* Load 64 bit unscaled signed 9 bit. */
7797 static void
7798 fldurd (sim_cpu *cpu, int32_t offset)
7799 {
7800 unsigned int rn = INSTR (9, 5);
7801 unsigned int st = INSTR (4, 0);
7802
7803 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7804 aarch64_set_vec_u64 (cpu, st, 0, aarch64_get_mem_u64
7805 (cpu, aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset));
7806 }
7807
7808 /* Load 128 bit unscaled signed 9 bit. */
7809 static void
7810 fldurq (sim_cpu *cpu, int32_t offset)
7811 {
7812 unsigned int rn = INSTR (9, 5);
7813 unsigned int st = INSTR (4, 0);
7814 FRegister a;
7815 uint64_t addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset;
7816
7817 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7818 aarch64_get_mem_long_double (cpu, addr, & a);
7819 aarch64_set_FP_long_double (cpu, st, a);
7820 }
7821
7822 /* TODO store 8 bit unscaled signed 9 bit. */
7823 /* TODO store 16 bit unscaled signed 9 bit. */
7824
7825
7826 /* 1 source. */
7827
7828 /* Float absolute value. */
7829 static void
7830 fabss (sim_cpu *cpu)
7831 {
7832 unsigned sn = INSTR (9, 5);
7833 unsigned sd = INSTR (4, 0);
7834 float value = aarch64_get_FP_float (cpu, sn);
7835
7836 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7837 aarch64_set_FP_float (cpu, sd, fabsf (value));
7838 }
7839
7840 /* Double absolute value. */
7841 static void
7842 fabcpu (sim_cpu *cpu)
7843 {
7844 unsigned sn = INSTR (9, 5);
7845 unsigned sd = INSTR (4, 0);
7846 double value = aarch64_get_FP_double (cpu, sn);
7847
7848 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7849 aarch64_set_FP_double (cpu, sd, fabs (value));
7850 }
7851
7852 /* Float negative value. */
7853 static void
7854 fnegs (sim_cpu *cpu)
7855 {
7856 unsigned sn = INSTR (9, 5);
7857 unsigned sd = INSTR (4, 0);
7858
7859 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7860 aarch64_set_FP_float (cpu, sd, - aarch64_get_FP_float (cpu, sn));
7861 }
7862
7863 /* Double negative value. */
7864 static void
7865 fnegd (sim_cpu *cpu)
7866 {
7867 unsigned sn = INSTR (9, 5);
7868 unsigned sd = INSTR (4, 0);
7869
7870 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7871 aarch64_set_FP_double (cpu, sd, - aarch64_get_FP_double (cpu, sn));
7872 }
7873
7874 /* Float square root. */
7875 static void
7876 fsqrts (sim_cpu *cpu)
7877 {
7878 unsigned sn = INSTR (9, 5);
7879 unsigned sd = INSTR (4, 0);
7880
7881 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7882 aarch64_set_FP_float (cpu, sd, sqrtf (aarch64_get_FP_float (cpu, sn)));
7883 }
7884
7885 /* Double square root. */
7886 static void
7887 fsqrtd (sim_cpu *cpu)
7888 {
7889 unsigned sn = INSTR (9, 5);
7890 unsigned sd = INSTR (4, 0);
7891
7892 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7893 aarch64_set_FP_double (cpu, sd,
7894 sqrt (aarch64_get_FP_double (cpu, sn)));
7895 }
7896
7897 /* Convert double to float. */
7898 static void
7899 fcvtds (sim_cpu *cpu)
7900 {
7901 unsigned sn = INSTR (9, 5);
7902 unsigned sd = INSTR (4, 0);
7903
7904 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7905 aarch64_set_FP_float (cpu, sd, (float) aarch64_get_FP_double (cpu, sn));
7906 }
7907
7908 /* Convert float to double. */
7909 static void
7910 fcvtcpu (sim_cpu *cpu)
7911 {
7912 unsigned sn = INSTR (9, 5);
7913 unsigned sd = INSTR (4, 0);
7914
7915 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7916 aarch64_set_FP_double (cpu, sd, (double) aarch64_get_FP_float (cpu, sn));
7917 }
7918
7919 static void
7920 do_FRINT (sim_cpu *cpu)
7921 {
7922 /* instr[31,23] = 0001 1110 0
7923 instr[22] = single(0)/double(1)
7924 instr[21,18] = 1001
7925 instr[17,15] = rounding mode
7926 instr[14,10] = 10000
7927 instr[9,5] = source
7928 instr[4,0] = dest */
7929
7930 float val;
7931 unsigned rs = INSTR (9, 5);
7932 unsigned rd = INSTR (4, 0);
7933 unsigned int rmode = INSTR (17, 15);
7934
7935 NYI_assert (31, 23, 0x03C);
7936 NYI_assert (21, 18, 0x9);
7937 NYI_assert (14, 10, 0x10);
7938
7939 if (rmode == 6 || rmode == 7)
7940 /* FIXME: Add support for rmode == 6 exactness check. */
7941 rmode = uimm (aarch64_get_FPSR (cpu), 23, 22);
7942
7943 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
7944 if (INSTR (22, 22))
7945 {
7946 double val = aarch64_get_FP_double (cpu, rs);
7947
7948 switch (rmode)
7949 {
7950 case 0: /* mode N: nearest or even. */
7951 {
7952 double rval = round (val);
7953
7954 if (val - rval == 0.5)
7955 {
7956 if (((rval / 2.0) * 2.0) != rval)
7957 rval += 1.0;
7958 }
7959
7960 aarch64_set_FP_double (cpu, rd, round (val));
7961 return;
7962 }
7963
7964 case 1: /* mode P: towards +inf. */
7965 if (val < 0.0)
7966 aarch64_set_FP_double (cpu, rd, trunc (val));
7967 else
7968 aarch64_set_FP_double (cpu, rd, round (val));
7969 return;
7970
7971 case 2: /* mode M: towards -inf. */
7972 if (val < 0.0)
7973 aarch64_set_FP_double (cpu, rd, round (val));
7974 else
7975 aarch64_set_FP_double (cpu, rd, trunc (val));
7976 return;
7977
7978 case 3: /* mode Z: towards 0. */
7979 aarch64_set_FP_double (cpu, rd, trunc (val));
7980 return;
7981
7982 case 4: /* mode A: away from 0. */
7983 aarch64_set_FP_double (cpu, rd, round (val));
7984 return;
7985
7986 case 6: /* mode X: use FPCR with exactness check. */
7987 case 7: /* mode I: use FPCR mode. */
7988 HALT_NYI;
7989
7990 default:
7991 HALT_UNALLOC;
7992 }
7993 }
7994
7995 val = aarch64_get_FP_float (cpu, rs);
7996
7997 switch (rmode)
7998 {
7999 case 0: /* mode N: nearest or even. */
8000 {
8001 float rval = roundf (val);
8002
8003 if (val - rval == 0.5)
8004 {
8005 if (((rval / 2.0) * 2.0) != rval)
8006 rval += 1.0;
8007 }
8008
8009 aarch64_set_FP_float (cpu, rd, rval);
8010 return;
8011 }
8012
8013 case 1: /* mode P: towards +inf. */
8014 if (val < 0.0)
8015 aarch64_set_FP_float (cpu, rd, truncf (val));
8016 else
8017 aarch64_set_FP_float (cpu, rd, roundf (val));
8018 return;
8019
8020 case 2: /* mode M: towards -inf. */
8021 if (val < 0.0)
8022 aarch64_set_FP_float (cpu, rd, truncf (val));
8023 else
8024 aarch64_set_FP_float (cpu, rd, roundf (val));
8025 return;
8026
8027 case 3: /* mode Z: towards 0. */
8028 aarch64_set_FP_float (cpu, rd, truncf (val));
8029 return;
8030
8031 case 4: /* mode A: away from 0. */
8032 aarch64_set_FP_float (cpu, rd, roundf (val));
8033 return;
8034
8035 case 6: /* mode X: use FPCR with exactness check. */
8036 case 7: /* mode I: use FPCR mode. */
8037 HALT_NYI;
8038
8039 default:
8040 HALT_UNALLOC;
8041 }
8042 }
8043
8044 /* Convert half to float. */
8045 static void
8046 do_FCVT_half_to_single (sim_cpu *cpu)
8047 {
8048 unsigned rn = INSTR (9, 5);
8049 unsigned rd = INSTR (4, 0);
8050
8051 NYI_assert (31, 10, 0x7B890);
8052
8053 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8054 aarch64_set_FP_float (cpu, rd, (float) aarch64_get_FP_half (cpu, rn));
8055 }
8056
8057 /* Convert half to double. */
8058 static void
8059 do_FCVT_half_to_double (sim_cpu *cpu)
8060 {
8061 unsigned rn = INSTR (9, 5);
8062 unsigned rd = INSTR (4, 0);
8063
8064 NYI_assert (31, 10, 0x7B8B0);
8065
8066 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8067 aarch64_set_FP_double (cpu, rd, (double) aarch64_get_FP_half (cpu, rn));
8068 }
8069
8070 static void
8071 do_FCVT_single_to_half (sim_cpu *cpu)
8072 {
8073 unsigned rn = INSTR (9, 5);
8074 unsigned rd = INSTR (4, 0);
8075
8076 NYI_assert (31, 10, 0x788F0);
8077
8078 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8079 aarch64_set_FP_half (cpu, rd, aarch64_get_FP_float (cpu, rn));
8080 }
8081
8082 /* Convert double to half. */
8083 static void
8084 do_FCVT_double_to_half (sim_cpu *cpu)
8085 {
8086 unsigned rn = INSTR (9, 5);
8087 unsigned rd = INSTR (4, 0);
8088
8089 NYI_assert (31, 10, 0x798F0);
8090
8091 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8092 aarch64_set_FP_half (cpu, rd, (float) aarch64_get_FP_double (cpu, rn));
8093 }
8094
8095 static void
8096 dexSimpleFPDataProc1Source (sim_cpu *cpu)
8097 {
8098 /* instr[31] ==> M : 0 ==> OK, 1 ==> UNALLOC
8099 instr[30] = 0
8100 instr[29] ==> S : 0 ==> OK, 1 ==> UNALLOC
8101 instr[28,25] = 1111
8102 instr[24] = 0
8103 instr[23,22] ==> type : 00 ==> source is single,
8104 01 ==> source is double
8105 10 ==> UNALLOC
8106 11 ==> UNALLOC or source is half
8107 instr[21] = 1
8108 instr[20,15] ==> opcode : with type 00 or 01
8109 000000 ==> FMOV, 000001 ==> FABS,
8110 000010 ==> FNEG, 000011 ==> FSQRT,
8111 000100 ==> UNALLOC, 000101 ==> FCVT,(to single/double)
8112 000110 ==> UNALLOC, 000111 ==> FCVT (to half)
8113 001000 ==> FRINTN, 001001 ==> FRINTP,
8114 001010 ==> FRINTM, 001011 ==> FRINTZ,
8115 001100 ==> FRINTA, 001101 ==> UNALLOC
8116 001110 ==> FRINTX, 001111 ==> FRINTI
8117 with type 11
8118 000100 ==> FCVT (half-to-single)
8119 000101 ==> FCVT (half-to-double)
8120 instr[14,10] = 10000. */
8121
8122 uint32_t M_S = (INSTR (31, 31) << 1) | INSTR (29, 29);
8123 uint32_t type = INSTR (23, 22);
8124 uint32_t opcode = INSTR (20, 15);
8125
8126 if (M_S != 0)
8127 HALT_UNALLOC;
8128
8129 if (type == 3)
8130 {
8131 if (opcode == 4)
8132 do_FCVT_half_to_single (cpu);
8133 else if (opcode == 5)
8134 do_FCVT_half_to_double (cpu);
8135 else
8136 HALT_UNALLOC;
8137 return;
8138 }
8139
8140 if (type == 2)
8141 HALT_UNALLOC;
8142
8143 switch (opcode)
8144 {
8145 case 0:
8146 if (type)
8147 ffmovd (cpu);
8148 else
8149 ffmovs (cpu);
8150 return;
8151
8152 case 1:
8153 if (type)
8154 fabcpu (cpu);
8155 else
8156 fabss (cpu);
8157 return;
8158
8159 case 2:
8160 if (type)
8161 fnegd (cpu);
8162 else
8163 fnegs (cpu);
8164 return;
8165
8166 case 3:
8167 if (type)
8168 fsqrtd (cpu);
8169 else
8170 fsqrts (cpu);
8171 return;
8172
8173 case 4:
8174 if (type)
8175 fcvtds (cpu);
8176 else
8177 HALT_UNALLOC;
8178 return;
8179
8180 case 5:
8181 if (type)
8182 HALT_UNALLOC;
8183 fcvtcpu (cpu);
8184 return;
8185
8186 case 8: /* FRINTN etc. */
8187 case 9:
8188 case 10:
8189 case 11:
8190 case 12:
8191 case 14:
8192 case 15:
8193 do_FRINT (cpu);
8194 return;
8195
8196 case 7:
8197 if (INSTR (22, 22))
8198 do_FCVT_double_to_half (cpu);
8199 else
8200 do_FCVT_single_to_half (cpu);
8201 return;
8202
8203 case 13:
8204 HALT_NYI;
8205
8206 default:
8207 HALT_UNALLOC;
8208 }
8209 }
8210
8211 /* 32 bit signed int to float. */
8212 static void
8213 scvtf32 (sim_cpu *cpu)
8214 {
8215 unsigned rn = INSTR (9, 5);
8216 unsigned sd = INSTR (4, 0);
8217
8218 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8219 aarch64_set_FP_float
8220 (cpu, sd, (float) aarch64_get_reg_s32 (cpu, rn, NO_SP));
8221 }
8222
8223 /* signed int to float. */
8224 static void
8225 scvtf (sim_cpu *cpu)
8226 {
8227 unsigned rn = INSTR (9, 5);
8228 unsigned sd = INSTR (4, 0);
8229
8230 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8231 aarch64_set_FP_float
8232 (cpu, sd, (float) aarch64_get_reg_s64 (cpu, rn, NO_SP));
8233 }
8234
8235 /* 32 bit signed int to double. */
8236 static void
8237 scvtd32 (sim_cpu *cpu)
8238 {
8239 unsigned rn = INSTR (9, 5);
8240 unsigned sd = INSTR (4, 0);
8241
8242 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8243 aarch64_set_FP_double
8244 (cpu, sd, (double) aarch64_get_reg_s32 (cpu, rn, NO_SP));
8245 }
8246
8247 /* signed int to double. */
8248 static void
8249 scvtd (sim_cpu *cpu)
8250 {
8251 unsigned rn = INSTR (9, 5);
8252 unsigned sd = INSTR (4, 0);
8253
8254 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8255 aarch64_set_FP_double
8256 (cpu, sd, (double) aarch64_get_reg_s64 (cpu, rn, NO_SP));
8257 }
8258
8259 static const float FLOAT_INT_MAX = (float) INT_MAX;
8260 static const float FLOAT_INT_MIN = (float) INT_MIN;
8261 static const double DOUBLE_INT_MAX = (double) INT_MAX;
8262 static const double DOUBLE_INT_MIN = (double) INT_MIN;
8263 static const float FLOAT_LONG_MAX = (float) LONG_MAX;
8264 static const float FLOAT_LONG_MIN = (float) LONG_MIN;
8265 static const double DOUBLE_LONG_MAX = (double) LONG_MAX;
8266 static const double DOUBLE_LONG_MIN = (double) LONG_MIN;
8267
8268 #define UINT_MIN 0
8269 #define ULONG_MIN 0
8270 static const float FLOAT_UINT_MAX = (float) UINT_MAX;
8271 static const float FLOAT_UINT_MIN = (float) UINT_MIN;
8272 static const double DOUBLE_UINT_MAX = (double) UINT_MAX;
8273 static const double DOUBLE_UINT_MIN = (double) UINT_MIN;
8274 static const float FLOAT_ULONG_MAX = (float) ULONG_MAX;
8275 static const float FLOAT_ULONG_MIN = (float) ULONG_MIN;
8276 static const double DOUBLE_ULONG_MAX = (double) ULONG_MAX;
8277 static const double DOUBLE_ULONG_MIN = (double) ULONG_MIN;
8278
8279 /* Check for FP exception conditions:
8280 NaN raises IO
8281 Infinity raises IO
8282 Out of Range raises IO and IX and saturates value
8283 Denormal raises ID and IX and sets to zero. */
8284 #define RAISE_EXCEPTIONS(F, VALUE, FTYPE, ITYPE) \
8285 do \
8286 { \
8287 switch (fpclassify (F)) \
8288 { \
8289 case FP_INFINITE: \
8290 case FP_NAN: \
8291 aarch64_set_FPSR (cpu, IO); \
8292 if (signbit (F)) \
8293 VALUE = ITYPE##_MAX; \
8294 else \
8295 VALUE = ITYPE##_MIN; \
8296 break; \
8297 \
8298 case FP_NORMAL: \
8299 if (F >= FTYPE##_##ITYPE##_MAX) \
8300 { \
8301 aarch64_set_FPSR_bits (cpu, IO | IX, IO | IX); \
8302 VALUE = ITYPE##_MAX; \
8303 } \
8304 else if (F <= FTYPE##_##ITYPE##_MIN) \
8305 { \
8306 aarch64_set_FPSR_bits (cpu, IO | IX, IO | IX); \
8307 VALUE = ITYPE##_MIN; \
8308 } \
8309 break; \
8310 \
8311 case FP_SUBNORMAL: \
8312 aarch64_set_FPSR_bits (cpu, IO | IX | ID, IX | ID); \
8313 VALUE = 0; \
8314 break; \
8315 \
8316 default: \
8317 case FP_ZERO: \
8318 VALUE = 0; \
8319 break; \
8320 } \
8321 } \
8322 while (0)
8323
8324 /* 32 bit convert float to signed int truncate towards zero. */
8325 static void
8326 fcvtszs32 (sim_cpu *cpu)
8327 {
8328 unsigned sn = INSTR (9, 5);
8329 unsigned rd = INSTR (4, 0);
8330 /* TODO : check that this rounds toward zero. */
8331 float f = aarch64_get_FP_float (cpu, sn);
8332 int32_t value = (int32_t) f;
8333
8334 RAISE_EXCEPTIONS (f, value, FLOAT, INT);
8335
8336 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8337 /* Avoid sign extension to 64 bit. */
8338 aarch64_set_reg_u64 (cpu, rd, NO_SP, (uint32_t) value);
8339 }
8340
8341 /* 64 bit convert float to signed int truncate towards zero. */
8342 static void
8343 fcvtszs (sim_cpu *cpu)
8344 {
8345 unsigned sn = INSTR (9, 5);
8346 unsigned rd = INSTR (4, 0);
8347 float f = aarch64_get_FP_float (cpu, sn);
8348 int64_t value = (int64_t) f;
8349
8350 RAISE_EXCEPTIONS (f, value, FLOAT, LONG);
8351
8352 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8353 aarch64_set_reg_s64 (cpu, rd, NO_SP, value);
8354 }
8355
8356 /* 32 bit convert double to signed int truncate towards zero. */
8357 static void
8358 fcvtszd32 (sim_cpu *cpu)
8359 {
8360 unsigned sn = INSTR (9, 5);
8361 unsigned rd = INSTR (4, 0);
8362 /* TODO : check that this rounds toward zero. */
8363 double d = aarch64_get_FP_double (cpu, sn);
8364 int32_t value = (int32_t) d;
8365
8366 RAISE_EXCEPTIONS (d, value, DOUBLE, INT);
8367
8368 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8369 /* Avoid sign extension to 64 bit. */
8370 aarch64_set_reg_u64 (cpu, rd, NO_SP, (uint32_t) value);
8371 }
8372
8373 /* 64 bit convert double to signed int truncate towards zero. */
8374 static void
8375 fcvtszd (sim_cpu *cpu)
8376 {
8377 unsigned sn = INSTR (9, 5);
8378 unsigned rd = INSTR (4, 0);
8379 /* TODO : check that this rounds toward zero. */
8380 double d = aarch64_get_FP_double (cpu, sn);
8381 int64_t value;
8382
8383 value = (int64_t) d;
8384
8385 RAISE_EXCEPTIONS (d, value, DOUBLE, LONG);
8386
8387 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8388 aarch64_set_reg_s64 (cpu, rd, NO_SP, value);
8389 }
8390
8391 static void
8392 do_fcvtzu (sim_cpu *cpu)
8393 {
8394 /* instr[31] = size: 32-bit (0), 64-bit (1)
8395 instr[30,23] = 00111100
8396 instr[22] = type: single (0)/ double (1)
8397 instr[21] = enable (0)/disable(1) precision
8398 instr[20,16] = 11001
8399 instr[15,10] = precision
8400 instr[9,5] = Rs
8401 instr[4,0] = Rd. */
8402
8403 unsigned rs = INSTR (9, 5);
8404 unsigned rd = INSTR (4, 0);
8405
8406 NYI_assert (30, 23, 0x3C);
8407 NYI_assert (20, 16, 0x19);
8408
8409 if (INSTR (21, 21) != 1)
8410 /* Convert to fixed point. */
8411 HALT_NYI;
8412
8413 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8414 if (INSTR (31, 31))
8415 {
8416 /* Convert to unsigned 64-bit integer. */
8417 if (INSTR (22, 22))
8418 {
8419 double d = aarch64_get_FP_double (cpu, rs);
8420 uint64_t value = (uint64_t) d;
8421
8422 /* Do not raise an exception if we have reached ULONG_MAX. */
8423 if (value != (1UL << 63))
8424 RAISE_EXCEPTIONS (d, value, DOUBLE, ULONG);
8425
8426 aarch64_set_reg_u64 (cpu, rd, NO_SP, value);
8427 }
8428 else
8429 {
8430 float f = aarch64_get_FP_float (cpu, rs);
8431 uint64_t value = (uint64_t) f;
8432
8433 /* Do not raise an exception if we have reached ULONG_MAX. */
8434 if (value != (1UL << 63))
8435 RAISE_EXCEPTIONS (f, value, FLOAT, ULONG);
8436
8437 aarch64_set_reg_u64 (cpu, rd, NO_SP, value);
8438 }
8439 }
8440 else
8441 {
8442 uint32_t value;
8443
8444 /* Convert to unsigned 32-bit integer. */
8445 if (INSTR (22, 22))
8446 {
8447 double d = aarch64_get_FP_double (cpu, rs);
8448
8449 value = (uint32_t) d;
8450 /* Do not raise an exception if we have reached UINT_MAX. */
8451 if (value != (1UL << 31))
8452 RAISE_EXCEPTIONS (d, value, DOUBLE, UINT);
8453 }
8454 else
8455 {
8456 float f = aarch64_get_FP_float (cpu, rs);
8457
8458 value = (uint32_t) f;
8459 /* Do not raise an exception if we have reached UINT_MAX. */
8460 if (value != (1UL << 31))
8461 RAISE_EXCEPTIONS (f, value, FLOAT, UINT);
8462 }
8463
8464 aarch64_set_reg_u64 (cpu, rd, NO_SP, value);
8465 }
8466 }
8467
8468 static void
8469 do_UCVTF (sim_cpu *cpu)
8470 {
8471 /* instr[31] = size: 32-bit (0), 64-bit (1)
8472 instr[30,23] = 001 1110 0
8473 instr[22] = type: single (0)/ double (1)
8474 instr[21] = enable (0)/disable(1) precision
8475 instr[20,16] = 0 0011
8476 instr[15,10] = precision
8477 instr[9,5] = Rs
8478 instr[4,0] = Rd. */
8479
8480 unsigned rs = INSTR (9, 5);
8481 unsigned rd = INSTR (4, 0);
8482
8483 NYI_assert (30, 23, 0x3C);
8484 NYI_assert (20, 16, 0x03);
8485
8486 if (INSTR (21, 21) != 1)
8487 HALT_NYI;
8488
8489 /* FIXME: Add exception raising. */
8490 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8491 if (INSTR (31, 31))
8492 {
8493 uint64_t value = aarch64_get_reg_u64 (cpu, rs, NO_SP);
8494
8495 if (INSTR (22, 22))
8496 aarch64_set_FP_double (cpu, rd, (double) value);
8497 else
8498 aarch64_set_FP_float (cpu, rd, (float) value);
8499 }
8500 else
8501 {
8502 uint32_t value = aarch64_get_reg_u32 (cpu, rs, NO_SP);
8503
8504 if (INSTR (22, 22))
8505 aarch64_set_FP_double (cpu, rd, (double) value);
8506 else
8507 aarch64_set_FP_float (cpu, rd, (float) value);
8508 }
8509 }
8510
8511 static void
8512 float_vector_move (sim_cpu *cpu)
8513 {
8514 /* instr[31,17] == 100 1111 0101 0111
8515 instr[16] ==> direction 0=> to GR, 1=> from GR
8516 instr[15,10] => ???
8517 instr[9,5] ==> source
8518 instr[4,0] ==> dest. */
8519
8520 unsigned rn = INSTR (9, 5);
8521 unsigned rd = INSTR (4, 0);
8522
8523 NYI_assert (31, 17, 0x4F57);
8524
8525 if (INSTR (15, 10) != 0)
8526 HALT_UNALLOC;
8527
8528 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8529 if (INSTR (16, 16))
8530 aarch64_set_vec_u64 (cpu, rd, 1, aarch64_get_reg_u64 (cpu, rn, NO_SP));
8531 else
8532 aarch64_set_reg_u64 (cpu, rd, NO_SP, aarch64_get_vec_u64 (cpu, rn, 1));
8533 }
8534
8535 static void
8536 dexSimpleFPIntegerConvert (sim_cpu *cpu)
8537 {
8538 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
8539 instr[30 = 0
8540 instr[29] = S : 0 ==> OK, 1 ==> UNALLOC
8541 instr[28,25] = 1111
8542 instr[24] = 0
8543 instr[23,22] = type : 00 ==> single, 01 ==> double, 1x ==> UNALLOC
8544 instr[21] = 1
8545 instr[20,19] = rmode
8546 instr[18,16] = opcode
8547 instr[15,10] = 10 0000 */
8548
8549 uint32_t rmode_opcode;
8550 uint32_t size_type;
8551 uint32_t type;
8552 uint32_t size;
8553 uint32_t S;
8554
8555 if (INSTR (31, 17) == 0x4F57)
8556 {
8557 float_vector_move (cpu);
8558 return;
8559 }
8560
8561 size = INSTR (31, 31);
8562 S = INSTR (29, 29);
8563 if (S != 0)
8564 HALT_UNALLOC;
8565
8566 type = INSTR (23, 22);
8567 if (type > 1)
8568 HALT_UNALLOC;
8569
8570 rmode_opcode = INSTR (20, 16);
8571 size_type = (size << 1) | type; /* 0==32f, 1==32d, 2==64f, 3==64d. */
8572
8573 switch (rmode_opcode)
8574 {
8575 case 2: /* SCVTF. */
8576 switch (size_type)
8577 {
8578 case 0: scvtf32 (cpu); return;
8579 case 1: scvtd32 (cpu); return;
8580 case 2: scvtf (cpu); return;
8581 case 3: scvtd (cpu); return;
8582 }
8583
8584 case 6: /* FMOV GR, Vec. */
8585 switch (size_type)
8586 {
8587 case 0: gfmovs (cpu); return;
8588 case 3: gfmovd (cpu); return;
8589 default: HALT_UNALLOC;
8590 }
8591
8592 case 7: /* FMOV vec, GR. */
8593 switch (size_type)
8594 {
8595 case 0: fgmovs (cpu); return;
8596 case 3: fgmovd (cpu); return;
8597 default: HALT_UNALLOC;
8598 }
8599
8600 case 24: /* FCVTZS. */
8601 switch (size_type)
8602 {
8603 case 0: fcvtszs32 (cpu); return;
8604 case 1: fcvtszd32 (cpu); return;
8605 case 2: fcvtszs (cpu); return;
8606 case 3: fcvtszd (cpu); return;
8607 }
8608
8609 case 25: do_fcvtzu (cpu); return;
8610 case 3: do_UCVTF (cpu); return;
8611
8612 case 0: /* FCVTNS. */
8613 case 1: /* FCVTNU. */
8614 case 4: /* FCVTAS. */
8615 case 5: /* FCVTAU. */
8616 case 8: /* FCVPTS. */
8617 case 9: /* FCVTPU. */
8618 case 16: /* FCVTMS. */
8619 case 17: /* FCVTMU. */
8620 default:
8621 HALT_NYI;
8622 }
8623 }
8624
8625 static void
8626 set_flags_for_float_compare (sim_cpu *cpu, float fvalue1, float fvalue2)
8627 {
8628 uint32_t flags;
8629
8630 /* FIXME: Add exception raising. */
8631 if (isnan (fvalue1) || isnan (fvalue2))
8632 flags = C|V;
8633 else if (isinf (fvalue1) && isinf (fvalue2))
8634 {
8635 /* Subtracting two infinities may give a NaN. We only need to compare
8636 the signs, which we can get from isinf. */
8637 int result = isinf (fvalue1) - isinf (fvalue2);
8638
8639 if (result == 0)
8640 flags = Z|C;
8641 else if (result < 0)
8642 flags = N;
8643 else /* (result > 0). */
8644 flags = C;
8645 }
8646 else
8647 {
8648 float result = fvalue1 - fvalue2;
8649
8650 if (result == 0.0)
8651 flags = Z|C;
8652 else if (result < 0)
8653 flags = N;
8654 else /* (result > 0). */
8655 flags = C;
8656 }
8657
8658 aarch64_set_CPSR (cpu, flags);
8659 }
8660
8661 static void
8662 fcmps (sim_cpu *cpu)
8663 {
8664 unsigned sm = INSTR (20, 16);
8665 unsigned sn = INSTR ( 9, 5);
8666
8667 float fvalue1 = aarch64_get_FP_float (cpu, sn);
8668 float fvalue2 = aarch64_get_FP_float (cpu, sm);
8669
8670 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8671 set_flags_for_float_compare (cpu, fvalue1, fvalue2);
8672 }
8673
8674 /* Float compare to zero -- Invalid Operation exception
8675 only on signaling NaNs. */
8676 static void
8677 fcmpzs (sim_cpu *cpu)
8678 {
8679 unsigned sn = INSTR ( 9, 5);
8680 float fvalue1 = aarch64_get_FP_float (cpu, sn);
8681
8682 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8683 set_flags_for_float_compare (cpu, fvalue1, 0.0f);
8684 }
8685
8686 /* Float compare -- Invalid Operation exception on all NaNs. */
8687 static void
8688 fcmpes (sim_cpu *cpu)
8689 {
8690 unsigned sm = INSTR (20, 16);
8691 unsigned sn = INSTR ( 9, 5);
8692
8693 float fvalue1 = aarch64_get_FP_float (cpu, sn);
8694 float fvalue2 = aarch64_get_FP_float (cpu, sm);
8695
8696 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8697 set_flags_for_float_compare (cpu, fvalue1, fvalue2);
8698 }
8699
8700 /* Float compare to zero -- Invalid Operation exception on all NaNs. */
8701 static void
8702 fcmpzes (sim_cpu *cpu)
8703 {
8704 unsigned sn = INSTR ( 9, 5);
8705 float fvalue1 = aarch64_get_FP_float (cpu, sn);
8706
8707 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8708 set_flags_for_float_compare (cpu, fvalue1, 0.0f);
8709 }
8710
8711 static void
8712 set_flags_for_double_compare (sim_cpu *cpu, double dval1, double dval2)
8713 {
8714 uint32_t flags;
8715
8716 /* FIXME: Add exception raising. */
8717 if (isnan (dval1) || isnan (dval2))
8718 flags = C|V;
8719 else if (isinf (dval1) && isinf (dval2))
8720 {
8721 /* Subtracting two infinities may give a NaN. We only need to compare
8722 the signs, which we can get from isinf. */
8723 int result = isinf (dval1) - isinf (dval2);
8724
8725 if (result == 0)
8726 flags = Z|C;
8727 else if (result < 0)
8728 flags = N;
8729 else /* (result > 0). */
8730 flags = C;
8731 }
8732 else
8733 {
8734 double result = dval1 - dval2;
8735
8736 if (result == 0.0)
8737 flags = Z|C;
8738 else if (result < 0)
8739 flags = N;
8740 else /* (result > 0). */
8741 flags = C;
8742 }
8743
8744 aarch64_set_CPSR (cpu, flags);
8745 }
8746
8747 /* Double compare -- Invalid Operation exception only on signaling NaNs. */
8748 static void
8749 fcmpd (sim_cpu *cpu)
8750 {
8751 unsigned sm = INSTR (20, 16);
8752 unsigned sn = INSTR ( 9, 5);
8753
8754 double dvalue1 = aarch64_get_FP_double (cpu, sn);
8755 double dvalue2 = aarch64_get_FP_double (cpu, sm);
8756
8757 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8758 set_flags_for_double_compare (cpu, dvalue1, dvalue2);
8759 }
8760
8761 /* Double compare to zero -- Invalid Operation exception
8762 only on signaling NaNs. */
8763 static void
8764 fcmpzd (sim_cpu *cpu)
8765 {
8766 unsigned sn = INSTR ( 9, 5);
8767 double dvalue1 = aarch64_get_FP_double (cpu, sn);
8768
8769 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8770 set_flags_for_double_compare (cpu, dvalue1, 0.0);
8771 }
8772
8773 /* Double compare -- Invalid Operation exception on all NaNs. */
8774 static void
8775 fcmped (sim_cpu *cpu)
8776 {
8777 unsigned sm = INSTR (20, 16);
8778 unsigned sn = INSTR ( 9, 5);
8779
8780 double dvalue1 = aarch64_get_FP_double (cpu, sn);
8781 double dvalue2 = aarch64_get_FP_double (cpu, sm);
8782
8783 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8784 set_flags_for_double_compare (cpu, dvalue1, dvalue2);
8785 }
8786
8787 /* Double compare to zero -- Invalid Operation exception on all NaNs. */
8788 static void
8789 fcmpzed (sim_cpu *cpu)
8790 {
8791 unsigned sn = INSTR ( 9, 5);
8792 double dvalue1 = aarch64_get_FP_double (cpu, sn);
8793
8794 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8795 set_flags_for_double_compare (cpu, dvalue1, 0.0);
8796 }
8797
8798 static void
8799 dexSimpleFPCompare (sim_cpu *cpu)
8800 {
8801 /* assert instr[28,25] == 1111
8802 instr[30:24:21:13,10] = 0011000
8803 instr[31] = M : 0 ==> OK, 1 ==> UNALLOC
8804 instr[29] ==> S : 0 ==> OK, 1 ==> UNALLOC
8805 instr[23,22] ==> type : 0 ==> single, 01 ==> double, 1x ==> UNALLOC
8806 instr[15,14] ==> op : 00 ==> OK, ow ==> UNALLOC
8807 instr[4,0] ==> opcode2 : 00000 ==> FCMP, 10000 ==> FCMPE,
8808 01000 ==> FCMPZ, 11000 ==> FCMPEZ,
8809 ow ==> UNALLOC */
8810 uint32_t dispatch;
8811 uint32_t M_S = (INSTR (31, 31) << 1) | INSTR (29, 29);
8812 uint32_t type = INSTR (23, 22);
8813 uint32_t op = INSTR (15, 14);
8814 uint32_t op2_2_0 = INSTR (2, 0);
8815
8816 if (op2_2_0 != 0)
8817 HALT_UNALLOC;
8818
8819 if (M_S != 0)
8820 HALT_UNALLOC;
8821
8822 if (type > 1)
8823 HALT_UNALLOC;
8824
8825 if (op != 0)
8826 HALT_UNALLOC;
8827
8828 /* dispatch on type and top 2 bits of opcode. */
8829 dispatch = (type << 2) | INSTR (4, 3);
8830
8831 switch (dispatch)
8832 {
8833 case 0: fcmps (cpu); return;
8834 case 1: fcmpzs (cpu); return;
8835 case 2: fcmpes (cpu); return;
8836 case 3: fcmpzes (cpu); return;
8837 case 4: fcmpd (cpu); return;
8838 case 5: fcmpzd (cpu); return;
8839 case 6: fcmped (cpu); return;
8840 case 7: fcmpzed (cpu); return;
8841 }
8842 }
8843
8844 static void
8845 do_scalar_FADDP (sim_cpu *cpu)
8846 {
8847 /* instr [31,23] = 0111 1110 0
8848 instr [22] = single(0)/double(1)
8849 instr [21,10] = 11 0000 1101 10
8850 instr [9,5] = Fn
8851 instr [4,0] = Fd. */
8852
8853 unsigned Fn = INSTR (9, 5);
8854 unsigned Fd = INSTR (4, 0);
8855
8856 NYI_assert (31, 23, 0x0FC);
8857 NYI_assert (21, 10, 0xC36);
8858
8859 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8860 if (INSTR (22, 22))
8861 {
8862 double val1 = aarch64_get_vec_double (cpu, Fn, 0);
8863 double val2 = aarch64_get_vec_double (cpu, Fn, 1);
8864
8865 aarch64_set_FP_double (cpu, Fd, val1 + val2);
8866 }
8867 else
8868 {
8869 float val1 = aarch64_get_vec_float (cpu, Fn, 0);
8870 float val2 = aarch64_get_vec_float (cpu, Fn, 1);
8871
8872 aarch64_set_FP_float (cpu, Fd, val1 + val2);
8873 }
8874 }
8875
8876 /* Floating point absolute difference. */
8877
8878 static void
8879 do_scalar_FABD (sim_cpu *cpu)
8880 {
8881 /* instr [31,23] = 0111 1110 1
8882 instr [22] = float(0)/double(1)
8883 instr [21] = 1
8884 instr [20,16] = Rm
8885 instr [15,10] = 1101 01
8886 instr [9, 5] = Rn
8887 instr [4, 0] = Rd. */
8888
8889 unsigned rm = INSTR (20, 16);
8890 unsigned rn = INSTR (9, 5);
8891 unsigned rd = INSTR (4, 0);
8892
8893 NYI_assert (31, 23, 0x0FD);
8894 NYI_assert (21, 21, 1);
8895 NYI_assert (15, 10, 0x35);
8896
8897 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8898 if (INSTR (22, 22))
8899 aarch64_set_FP_double (cpu, rd,
8900 fabs (aarch64_get_FP_double (cpu, rn)
8901 - aarch64_get_FP_double (cpu, rm)));
8902 else
8903 aarch64_set_FP_float (cpu, rd,
8904 fabsf (aarch64_get_FP_float (cpu, rn)
8905 - aarch64_get_FP_float (cpu, rm)));
8906 }
8907
8908 static void
8909 do_scalar_CMGT (sim_cpu *cpu)
8910 {
8911 /* instr [31,21] = 0101 1110 111
8912 instr [20,16] = Rm
8913 instr [15,10] = 00 1101
8914 instr [9, 5] = Rn
8915 instr [4, 0] = Rd. */
8916
8917 unsigned rm = INSTR (20, 16);
8918 unsigned rn = INSTR (9, 5);
8919 unsigned rd = INSTR (4, 0);
8920
8921 NYI_assert (31, 21, 0x2F7);
8922 NYI_assert (15, 10, 0x0D);
8923
8924 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8925 aarch64_set_vec_u64 (cpu, rd, 0,
8926 aarch64_get_vec_u64 (cpu, rn, 0) >
8927 aarch64_get_vec_u64 (cpu, rm, 0) ? -1L : 0L);
8928 }
8929
8930 static void
8931 do_scalar_USHR (sim_cpu *cpu)
8932 {
8933 /* instr [31,23] = 0111 1111 0
8934 instr [22,16] = shift amount
8935 instr [15,10] = 0000 01
8936 instr [9, 5] = Rn
8937 instr [4, 0] = Rd. */
8938
8939 unsigned amount = 128 - INSTR (22, 16);
8940 unsigned rn = INSTR (9, 5);
8941 unsigned rd = INSTR (4, 0);
8942
8943 NYI_assert (31, 23, 0x0FE);
8944 NYI_assert (15, 10, 0x01);
8945
8946 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8947 aarch64_set_vec_u64 (cpu, rd, 0,
8948 aarch64_get_vec_u64 (cpu, rn, 0) >> amount);
8949 }
8950
8951 static void
8952 do_scalar_SSHL (sim_cpu *cpu)
8953 {
8954 /* instr [31,21] = 0101 1110 111
8955 instr [20,16] = Rm
8956 instr [15,10] = 0100 01
8957 instr [9, 5] = Rn
8958 instr [4, 0] = Rd. */
8959
8960 unsigned rm = INSTR (20, 16);
8961 unsigned rn = INSTR (9, 5);
8962 unsigned rd = INSTR (4, 0);
8963 signed int shift = aarch64_get_vec_s8 (cpu, rm, 0);
8964
8965 NYI_assert (31, 21, 0x2F7);
8966 NYI_assert (15, 10, 0x11);
8967
8968 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8969 if (shift >= 0)
8970 aarch64_set_vec_s64 (cpu, rd, 0,
8971 aarch64_get_vec_s64 (cpu, rn, 0) << shift);
8972 else
8973 aarch64_set_vec_s64 (cpu, rd, 0,
8974 aarch64_get_vec_s64 (cpu, rn, 0) >> - shift);
8975 }
8976
8977 /* Floating point scalar compare greater than or equal to 0. */
8978 static void
8979 do_scalar_FCMGE_zero (sim_cpu *cpu)
8980 {
8981 /* instr [31,23] = 0111 1110 1
8982 instr [22,22] = size
8983 instr [21,16] = 1000 00
8984 instr [15,10] = 1100 10
8985 instr [9, 5] = Rn
8986 instr [4, 0] = Rd. */
8987
8988 unsigned size = INSTR (22, 22);
8989 unsigned rn = INSTR (9, 5);
8990 unsigned rd = INSTR (4, 0);
8991
8992 NYI_assert (31, 23, 0x0FD);
8993 NYI_assert (21, 16, 0x20);
8994 NYI_assert (15, 10, 0x32);
8995
8996 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
8997 if (size)
8998 aarch64_set_vec_u64 (cpu, rd, 0,
8999 aarch64_get_vec_double (cpu, rn, 0) >= 0.0 ? -1 : 0);
9000 else
9001 aarch64_set_vec_u32 (cpu, rd, 0,
9002 aarch64_get_vec_float (cpu, rn, 0) >= 0.0 ? -1 : 0);
9003 }
9004
9005 /* Floating point scalar compare less than or equal to 0. */
9006 static void
9007 do_scalar_FCMLE_zero (sim_cpu *cpu)
9008 {
9009 /* instr [31,23] = 0111 1110 1
9010 instr [22,22] = size
9011 instr [21,16] = 1000 00
9012 instr [15,10] = 1101 10
9013 instr [9, 5] = Rn
9014 instr [4, 0] = Rd. */
9015
9016 unsigned size = INSTR (22, 22);
9017 unsigned rn = INSTR (9, 5);
9018 unsigned rd = INSTR (4, 0);
9019
9020 NYI_assert (31, 23, 0x0FD);
9021 NYI_assert (21, 16, 0x20);
9022 NYI_assert (15, 10, 0x36);
9023
9024 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9025 if (size)
9026 aarch64_set_vec_u64 (cpu, rd, 0,
9027 aarch64_get_vec_double (cpu, rn, 0) <= 0.0 ? -1 : 0);
9028 else
9029 aarch64_set_vec_u32 (cpu, rd, 0,
9030 aarch64_get_vec_float (cpu, rn, 0) <= 0.0 ? -1 : 0);
9031 }
9032
9033 /* Floating point scalar compare greater than 0. */
9034 static void
9035 do_scalar_FCMGT_zero (sim_cpu *cpu)
9036 {
9037 /* instr [31,23] = 0101 1110 1
9038 instr [22,22] = size
9039 instr [21,16] = 1000 00
9040 instr [15,10] = 1100 10
9041 instr [9, 5] = Rn
9042 instr [4, 0] = Rd. */
9043
9044 unsigned size = INSTR (22, 22);
9045 unsigned rn = INSTR (9, 5);
9046 unsigned rd = INSTR (4, 0);
9047
9048 NYI_assert (31, 23, 0x0BD);
9049 NYI_assert (21, 16, 0x20);
9050 NYI_assert (15, 10, 0x32);
9051
9052 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9053 if (size)
9054 aarch64_set_vec_u64 (cpu, rd, 0,
9055 aarch64_get_vec_double (cpu, rn, 0) > 0.0 ? -1 : 0);
9056 else
9057 aarch64_set_vec_u32 (cpu, rd, 0,
9058 aarch64_get_vec_float (cpu, rn, 0) > 0.0 ? -1 : 0);
9059 }
9060
9061 /* Floating point scalar compare equal to 0. */
9062 static void
9063 do_scalar_FCMEQ_zero (sim_cpu *cpu)
9064 {
9065 /* instr [31,23] = 0101 1110 1
9066 instr [22,22] = size
9067 instr [21,16] = 1000 00
9068 instr [15,10] = 1101 10
9069 instr [9, 5] = Rn
9070 instr [4, 0] = Rd. */
9071
9072 unsigned size = INSTR (22, 22);
9073 unsigned rn = INSTR (9, 5);
9074 unsigned rd = INSTR (4, 0);
9075
9076 NYI_assert (31, 23, 0x0BD);
9077 NYI_assert (21, 16, 0x20);
9078 NYI_assert (15, 10, 0x36);
9079
9080 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9081 if (size)
9082 aarch64_set_vec_u64 (cpu, rd, 0,
9083 aarch64_get_vec_double (cpu, rn, 0) == 0.0 ? -1 : 0);
9084 else
9085 aarch64_set_vec_u32 (cpu, rd, 0,
9086 aarch64_get_vec_float (cpu, rn, 0) == 0.0 ? -1 : 0);
9087 }
9088
9089 /* Floating point scalar compare less than 0. */
9090 static void
9091 do_scalar_FCMLT_zero (sim_cpu *cpu)
9092 {
9093 /* instr [31,23] = 0101 1110 1
9094 instr [22,22] = size
9095 instr [21,16] = 1000 00
9096 instr [15,10] = 1110 10
9097 instr [9, 5] = Rn
9098 instr [4, 0] = Rd. */
9099
9100 unsigned size = INSTR (22, 22);
9101 unsigned rn = INSTR (9, 5);
9102 unsigned rd = INSTR (4, 0);
9103
9104 NYI_assert (31, 23, 0x0BD);
9105 NYI_assert (21, 16, 0x20);
9106 NYI_assert (15, 10, 0x3A);
9107
9108 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9109 if (size)
9110 aarch64_set_vec_u64 (cpu, rd, 0,
9111 aarch64_get_vec_double (cpu, rn, 0) < 0.0 ? -1 : 0);
9112 else
9113 aarch64_set_vec_u32 (cpu, rd, 0,
9114 aarch64_get_vec_float (cpu, rn, 0) < 0.0 ? -1 : 0);
9115 }
9116
9117 static void
9118 do_scalar_shift (sim_cpu *cpu)
9119 {
9120 /* instr [31,23] = 0101 1111 0
9121 instr [22,16] = shift amount
9122 instr [15,10] = 0101 01 [SHL]
9123 instr [15,10] = 0000 01 [SSHR]
9124 instr [9, 5] = Rn
9125 instr [4, 0] = Rd. */
9126
9127 unsigned rn = INSTR (9, 5);
9128 unsigned rd = INSTR (4, 0);
9129 unsigned amount;
9130
9131 NYI_assert (31, 23, 0x0BE);
9132
9133 if (INSTR (22, 22) == 0)
9134 HALT_UNALLOC;
9135
9136 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9137 switch (INSTR (15, 10))
9138 {
9139 case 0x01: /* SSHR */
9140 amount = 128 - INSTR (22, 16);
9141 aarch64_set_vec_s64 (cpu, rd, 0,
9142 aarch64_get_vec_s64 (cpu, rn, 0) >> amount);
9143 return;
9144 case 0x15: /* SHL */
9145 amount = INSTR (22, 16) - 64;
9146 aarch64_set_vec_u64 (cpu, rd, 0,
9147 aarch64_get_vec_u64 (cpu, rn, 0) << amount);
9148 return;
9149 default:
9150 HALT_NYI;
9151 }
9152 }
9153
9154 /* FCMEQ FCMGT FCMGE. */
9155 static void
9156 do_scalar_FCM (sim_cpu *cpu)
9157 {
9158 /* instr [31,30] = 01
9159 instr [29] = U
9160 instr [28,24] = 1 1110
9161 instr [23] = E
9162 instr [22] = size
9163 instr [21] = 1
9164 instr [20,16] = Rm
9165 instr [15,12] = 1110
9166 instr [11] = AC
9167 instr [10] = 1
9168 instr [9, 5] = Rn
9169 instr [4, 0] = Rd. */
9170
9171 unsigned rm = INSTR (20, 16);
9172 unsigned rn = INSTR (9, 5);
9173 unsigned rd = INSTR (4, 0);
9174 unsigned EUac = (INSTR (23, 23) << 2) | (INSTR (29, 29) << 1) | INSTR (11, 11);
9175 unsigned result;
9176 float val1;
9177 float val2;
9178
9179 NYI_assert (31, 30, 1);
9180 NYI_assert (28, 24, 0x1E);
9181 NYI_assert (21, 21, 1);
9182 NYI_assert (15, 12, 0xE);
9183 NYI_assert (10, 10, 1);
9184
9185 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9186 if (INSTR (22, 22))
9187 {
9188 double val1 = aarch64_get_FP_double (cpu, rn);
9189 double val2 = aarch64_get_FP_double (cpu, rm);
9190
9191 switch (EUac)
9192 {
9193 case 0: /* 000 */
9194 result = val1 == val2;
9195 break;
9196
9197 case 3: /* 011 */
9198 val1 = fabs (val1);
9199 val2 = fabs (val2);
9200 /* Fall through. */
9201 case 2: /* 010 */
9202 result = val1 >= val2;
9203 break;
9204
9205 case 7: /* 111 */
9206 val1 = fabs (val1);
9207 val2 = fabs (val2);
9208 /* Fall through. */
9209 case 6: /* 110 */
9210 result = val1 > val2;
9211 break;
9212
9213 default:
9214 HALT_UNALLOC;
9215 }
9216
9217 aarch64_set_vec_u32 (cpu, rd, 0, result ? -1 : 0);
9218 return;
9219 }
9220
9221 val1 = aarch64_get_FP_float (cpu, rn);
9222 val2 = aarch64_get_FP_float (cpu, rm);
9223
9224 switch (EUac)
9225 {
9226 case 0: /* 000 */
9227 result = val1 == val2;
9228 break;
9229
9230 case 3: /* 011 */
9231 val1 = fabsf (val1);
9232 val2 = fabsf (val2);
9233 /* Fall through. */
9234 case 2: /* 010 */
9235 result = val1 >= val2;
9236 break;
9237
9238 case 7: /* 111 */
9239 val1 = fabsf (val1);
9240 val2 = fabsf (val2);
9241 /* Fall through. */
9242 case 6: /* 110 */
9243 result = val1 > val2;
9244 break;
9245
9246 default:
9247 HALT_UNALLOC;
9248 }
9249
9250 aarch64_set_vec_u32 (cpu, rd, 0, result ? -1 : 0);
9251 }
9252
9253 /* An alias of DUP. */
9254 static void
9255 do_scalar_MOV (sim_cpu *cpu)
9256 {
9257 /* instr [31,21] = 0101 1110 000
9258 instr [20,16] = imm5
9259 instr [15,10] = 0000 01
9260 instr [9, 5] = Rn
9261 instr [4, 0] = Rd. */
9262
9263 unsigned rn = INSTR (9, 5);
9264 unsigned rd = INSTR (4, 0);
9265 unsigned index;
9266
9267 NYI_assert (31, 21, 0x2F0);
9268 NYI_assert (15, 10, 0x01);
9269
9270 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9271 if (INSTR (16, 16))
9272 {
9273 /* 8-bit. */
9274 index = INSTR (20, 17);
9275 aarch64_set_vec_u8
9276 (cpu, rd, 0, aarch64_get_vec_u8 (cpu, rn, index));
9277 }
9278 else if (INSTR (17, 17))
9279 {
9280 /* 16-bit. */
9281 index = INSTR (20, 18);
9282 aarch64_set_vec_u16
9283 (cpu, rd, 0, aarch64_get_vec_u16 (cpu, rn, index));
9284 }
9285 else if (INSTR (18, 18))
9286 {
9287 /* 32-bit. */
9288 index = INSTR (20, 19);
9289 aarch64_set_vec_u32
9290 (cpu, rd, 0, aarch64_get_vec_u32 (cpu, rn, index));
9291 }
9292 else if (INSTR (19, 19))
9293 {
9294 /* 64-bit. */
9295 index = INSTR (20, 20);
9296 aarch64_set_vec_u64
9297 (cpu, rd, 0, aarch64_get_vec_u64 (cpu, rn, index));
9298 }
9299 else
9300 HALT_UNALLOC;
9301 }
9302
9303 static void
9304 do_scalar_NEG (sim_cpu *cpu)
9305 {
9306 /* instr [31,10] = 0111 1110 1110 0000 1011 10
9307 instr [9, 5] = Rn
9308 instr [4, 0] = Rd. */
9309
9310 unsigned rn = INSTR (9, 5);
9311 unsigned rd = INSTR (4, 0);
9312
9313 NYI_assert (31, 10, 0x1FB82E);
9314
9315 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9316 aarch64_set_vec_u64 (cpu, rd, 0, - aarch64_get_vec_u64 (cpu, rn, 0));
9317 }
9318
9319 static void
9320 do_scalar_USHL (sim_cpu *cpu)
9321 {
9322 /* instr [31,21] = 0111 1110 111
9323 instr [20,16] = Rm
9324 instr [15,10] = 0100 01
9325 instr [9, 5] = Rn
9326 instr [4, 0] = Rd. */
9327
9328 unsigned rm = INSTR (20, 16);
9329 unsigned rn = INSTR (9, 5);
9330 unsigned rd = INSTR (4, 0);
9331 signed int shift = aarch64_get_vec_s8 (cpu, rm, 0);
9332
9333 NYI_assert (31, 21, 0x3F7);
9334 NYI_assert (15, 10, 0x11);
9335
9336 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9337 if (shift >= 0)
9338 aarch64_set_vec_u64 (cpu, rd, 0, aarch64_get_vec_u64 (cpu, rn, 0) << shift);
9339 else
9340 aarch64_set_vec_u64 (cpu, rd, 0, aarch64_get_vec_u64 (cpu, rn, 0) >> - shift);
9341 }
9342
9343 static void
9344 do_double_add (sim_cpu *cpu)
9345 {
9346 /* instr [31,21] = 0101 1110 111
9347 instr [20,16] = Fn
9348 instr [15,10] = 1000 01
9349 instr [9,5] = Fm
9350 instr [4,0] = Fd. */
9351 unsigned Fd;
9352 unsigned Fm;
9353 unsigned Fn;
9354 double val1;
9355 double val2;
9356
9357 NYI_assert (31, 21, 0x2F7);
9358 NYI_assert (15, 10, 0x21);
9359
9360 Fd = INSTR (4, 0);
9361 Fm = INSTR (9, 5);
9362 Fn = INSTR (20, 16);
9363
9364 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9365 val1 = aarch64_get_FP_double (cpu, Fm);
9366 val2 = aarch64_get_FP_double (cpu, Fn);
9367
9368 aarch64_set_FP_double (cpu, Fd, val1 + val2);
9369 }
9370
9371 static void
9372 do_scalar_UCVTF (sim_cpu *cpu)
9373 {
9374 /* instr [31,23] = 0111 1110 0
9375 instr [22] = single(0)/double(1)
9376 instr [21,10] = 10 0001 1101 10
9377 instr [9,5] = rn
9378 instr [4,0] = rd. */
9379
9380 unsigned rn = INSTR (9, 5);
9381 unsigned rd = INSTR (4, 0);
9382
9383 NYI_assert (31, 23, 0x0FC);
9384 NYI_assert (21, 10, 0x876);
9385
9386 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9387 if (INSTR (22, 22))
9388 {
9389 uint64_t val = aarch64_get_vec_u64 (cpu, rn, 0);
9390
9391 aarch64_set_vec_double (cpu, rd, 0, (double) val);
9392 }
9393 else
9394 {
9395 uint32_t val = aarch64_get_vec_u32 (cpu, rn, 0);
9396
9397 aarch64_set_vec_float (cpu, rd, 0, (float) val);
9398 }
9399 }
9400
9401 static void
9402 do_scalar_vec (sim_cpu *cpu)
9403 {
9404 /* instr [30] = 1. */
9405 /* instr [28,25] = 1111. */
9406 switch (INSTR (31, 23))
9407 {
9408 case 0xBC:
9409 switch (INSTR (15, 10))
9410 {
9411 case 0x01: do_scalar_MOV (cpu); return;
9412 case 0x39: do_scalar_FCM (cpu); return;
9413 case 0x3B: do_scalar_FCM (cpu); return;
9414 }
9415 break;
9416
9417 case 0xBE: do_scalar_shift (cpu); return;
9418
9419 case 0xFC:
9420 switch (INSTR (15, 10))
9421 {
9422 case 0x36:
9423 switch (INSTR (21, 16))
9424 {
9425 case 0x30: do_scalar_FADDP (cpu); return;
9426 case 0x21: do_scalar_UCVTF (cpu); return;
9427 }
9428 HALT_NYI;
9429 case 0x39: do_scalar_FCM (cpu); return;
9430 case 0x3B: do_scalar_FCM (cpu); return;
9431 }
9432 break;
9433
9434 case 0xFD:
9435 switch (INSTR (15, 10))
9436 {
9437 case 0x0D: do_scalar_CMGT (cpu); return;
9438 case 0x11: do_scalar_USHL (cpu); return;
9439 case 0x2E: do_scalar_NEG (cpu); return;
9440 case 0x32: do_scalar_FCMGE_zero (cpu); return;
9441 case 0x35: do_scalar_FABD (cpu); return;
9442 case 0x36: do_scalar_FCMLE_zero (cpu); return;
9443 case 0x39: do_scalar_FCM (cpu); return;
9444 case 0x3B: do_scalar_FCM (cpu); return;
9445 default:
9446 HALT_NYI;
9447 }
9448
9449 case 0xFE: do_scalar_USHR (cpu); return;
9450
9451 case 0xBD:
9452 switch (INSTR (15, 10))
9453 {
9454 case 0x21: do_double_add (cpu); return;
9455 case 0x11: do_scalar_SSHL (cpu); return;
9456 case 0x32: do_scalar_FCMGT_zero (cpu); return;
9457 case 0x36: do_scalar_FCMEQ_zero (cpu); return;
9458 case 0x3A: do_scalar_FCMLT_zero (cpu); return;
9459 default:
9460 HALT_NYI;
9461 }
9462
9463 default:
9464 HALT_NYI;
9465 }
9466 }
9467
9468 static void
9469 dexAdvSIMD1 (sim_cpu *cpu)
9470 {
9471 /* instr [28,25] = 1 111. */
9472
9473 /* We are currently only interested in the basic
9474 scalar fp routines which all have bit 30 = 0. */
9475 if (INSTR (30, 30))
9476 do_scalar_vec (cpu);
9477
9478 /* instr[24] is set for FP data processing 3-source and clear for
9479 all other basic scalar fp instruction groups. */
9480 else if (INSTR (24, 24))
9481 dexSimpleFPDataProc3Source (cpu);
9482
9483 /* instr[21] is clear for floating <-> fixed conversions and set for
9484 all other basic scalar fp instruction groups. */
9485 else if (!INSTR (21, 21))
9486 dexSimpleFPFixedConvert (cpu);
9487
9488 /* instr[11,10] : 01 ==> cond compare, 10 ==> Data Proc 2 Source
9489 11 ==> cond select, 00 ==> other. */
9490 else
9491 switch (INSTR (11, 10))
9492 {
9493 case 1: dexSimpleFPCondCompare (cpu); return;
9494 case 2: dexSimpleFPDataProc2Source (cpu); return;
9495 case 3: dexSimpleFPCondSelect (cpu); return;
9496
9497 default:
9498 /* Now an ordered cascade of tests.
9499 FP immediate has instr [12] == 1.
9500 FP compare has instr [13] == 1.
9501 FP Data Proc 1 Source has instr [14] == 1.
9502 FP floating <--> integer conversions has instr [15] == 0. */
9503 if (INSTR (12, 12))
9504 dexSimpleFPImmediate (cpu);
9505
9506 else if (INSTR (13, 13))
9507 dexSimpleFPCompare (cpu);
9508
9509 else if (INSTR (14, 14))
9510 dexSimpleFPDataProc1Source (cpu);
9511
9512 else if (!INSTR (15, 15))
9513 dexSimpleFPIntegerConvert (cpu);
9514
9515 else
9516 /* If we get here then instr[15] == 1 which means UNALLOC. */
9517 HALT_UNALLOC;
9518 }
9519 }
9520
9521 /* PC relative addressing. */
9522
9523 static void
9524 pcadr (sim_cpu *cpu)
9525 {
9526 /* instr[31] = op : 0 ==> ADR, 1 ==> ADRP
9527 instr[30,29] = immlo
9528 instr[23,5] = immhi. */
9529 uint64_t address;
9530 unsigned rd = INSTR (4, 0);
9531 uint32_t isPage = INSTR (31, 31);
9532 union { int64_t u64; uint64_t s64; } imm;
9533 uint64_t offset;
9534
9535 imm.s64 = simm64 (aarch64_get_instr (cpu), 23, 5);
9536 offset = imm.u64;
9537 offset = (offset << 2) | INSTR (30, 29);
9538
9539 address = aarch64_get_PC (cpu);
9540
9541 if (isPage)
9542 {
9543 offset <<= 12;
9544 address &= ~0xfff;
9545 }
9546
9547 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9548 aarch64_set_reg_u64 (cpu, rd, NO_SP, address + offset);
9549 }
9550
9551 /* Specific decode and execute for group Data Processing Immediate. */
9552
9553 static void
9554 dexPCRelAddressing (sim_cpu *cpu)
9555 {
9556 /* assert instr[28,24] = 10000. */
9557 pcadr (cpu);
9558 }
9559
9560 /* Immediate logical.
9561 The bimm32/64 argument is constructed by replicating a 2, 4, 8,
9562 16, 32 or 64 bit sequence pulled out at decode and possibly
9563 inverting it..
9564
9565 N.B. the output register (dest) can normally be Xn or SP
9566 the exception occurs for flag setting instructions which may
9567 only use Xn for the output (dest). The input register can
9568 never be SP. */
9569
9570 /* 32 bit and immediate. */
9571 static void
9572 and32 (sim_cpu *cpu, uint32_t bimm)
9573 {
9574 unsigned rn = INSTR (9, 5);
9575 unsigned rd = INSTR (4, 0);
9576
9577 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9578 aarch64_set_reg_u64 (cpu, rd, SP_OK,
9579 aarch64_get_reg_u32 (cpu, rn, NO_SP) & bimm);
9580 }
9581
9582 /* 64 bit and immediate. */
9583 static void
9584 and64 (sim_cpu *cpu, uint64_t bimm)
9585 {
9586 unsigned rn = INSTR (9, 5);
9587 unsigned rd = INSTR (4, 0);
9588
9589 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9590 aarch64_set_reg_u64 (cpu, rd, SP_OK,
9591 aarch64_get_reg_u64 (cpu, rn, NO_SP) & bimm);
9592 }
9593
9594 /* 32 bit and immediate set flags. */
9595 static void
9596 ands32 (sim_cpu *cpu, uint32_t bimm)
9597 {
9598 unsigned rn = INSTR (9, 5);
9599 unsigned rd = INSTR (4, 0);
9600
9601 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
9602 uint32_t value2 = bimm;
9603
9604 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9605 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 & value2);
9606 set_flags_for_binop32 (cpu, value1 & value2);
9607 }
9608
9609 /* 64 bit and immediate set flags. */
9610 static void
9611 ands64 (sim_cpu *cpu, uint64_t bimm)
9612 {
9613 unsigned rn = INSTR (9, 5);
9614 unsigned rd = INSTR (4, 0);
9615
9616 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
9617 uint64_t value2 = bimm;
9618
9619 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9620 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 & value2);
9621 set_flags_for_binop64 (cpu, value1 & value2);
9622 }
9623
9624 /* 32 bit exclusive or immediate. */
9625 static void
9626 eor32 (sim_cpu *cpu, uint32_t bimm)
9627 {
9628 unsigned rn = INSTR (9, 5);
9629 unsigned rd = INSTR (4, 0);
9630
9631 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9632 aarch64_set_reg_u64 (cpu, rd, SP_OK,
9633 aarch64_get_reg_u32 (cpu, rn, NO_SP) ^ bimm);
9634 }
9635
9636 /* 64 bit exclusive or immediate. */
9637 static void
9638 eor64 (sim_cpu *cpu, uint64_t bimm)
9639 {
9640 unsigned rn = INSTR (9, 5);
9641 unsigned rd = INSTR (4, 0);
9642
9643 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9644 aarch64_set_reg_u64 (cpu, rd, SP_OK,
9645 aarch64_get_reg_u64 (cpu, rn, NO_SP) ^ bimm);
9646 }
9647
9648 /* 32 bit or immediate. */
9649 static void
9650 orr32 (sim_cpu *cpu, uint32_t bimm)
9651 {
9652 unsigned rn = INSTR (9, 5);
9653 unsigned rd = INSTR (4, 0);
9654
9655 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9656 aarch64_set_reg_u64 (cpu, rd, SP_OK,
9657 aarch64_get_reg_u32 (cpu, rn, NO_SP) | bimm);
9658 }
9659
9660 /* 64 bit or immediate. */
9661 static void
9662 orr64 (sim_cpu *cpu, uint64_t bimm)
9663 {
9664 unsigned rn = INSTR (9, 5);
9665 unsigned rd = INSTR (4, 0);
9666
9667 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9668 aarch64_set_reg_u64 (cpu, rd, SP_OK,
9669 aarch64_get_reg_u64 (cpu, rn, NO_SP) | bimm);
9670 }
9671
9672 /* Logical shifted register.
9673 These allow an optional LSL, ASR, LSR or ROR to the second source
9674 register with a count up to the register bit count.
9675 N.B register args may not be SP. */
9676
9677 /* 32 bit AND shifted register. */
9678 static void
9679 and32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9680 {
9681 unsigned rm = INSTR (20, 16);
9682 unsigned rn = INSTR (9, 5);
9683 unsigned rd = INSTR (4, 0);
9684
9685 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9686 aarch64_set_reg_u64
9687 (cpu, rd, NO_SP, aarch64_get_reg_u32 (cpu, rn, NO_SP)
9688 & shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP), shift, count));
9689 }
9690
9691 /* 64 bit AND shifted register. */
9692 static void
9693 and64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9694 {
9695 unsigned rm = INSTR (20, 16);
9696 unsigned rn = INSTR (9, 5);
9697 unsigned rd = INSTR (4, 0);
9698
9699 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9700 aarch64_set_reg_u64
9701 (cpu, rd, NO_SP, aarch64_get_reg_u64 (cpu, rn, NO_SP)
9702 & shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP), shift, count));
9703 }
9704
9705 /* 32 bit AND shifted register setting flags. */
9706 static void
9707 ands32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9708 {
9709 unsigned rm = INSTR (20, 16);
9710 unsigned rn = INSTR (9, 5);
9711 unsigned rd = INSTR (4, 0);
9712
9713 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
9714 uint32_t value2 = shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP),
9715 shift, count);
9716
9717 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9718 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 & value2);
9719 set_flags_for_binop32 (cpu, value1 & value2);
9720 }
9721
9722 /* 64 bit AND shifted register setting flags. */
9723 static void
9724 ands64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9725 {
9726 unsigned rm = INSTR (20, 16);
9727 unsigned rn = INSTR (9, 5);
9728 unsigned rd = INSTR (4, 0);
9729
9730 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
9731 uint64_t value2 = shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP),
9732 shift, count);
9733
9734 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9735 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 & value2);
9736 set_flags_for_binop64 (cpu, value1 & value2);
9737 }
9738
9739 /* 32 bit BIC shifted register. */
9740 static void
9741 bic32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9742 {
9743 unsigned rm = INSTR (20, 16);
9744 unsigned rn = INSTR (9, 5);
9745 unsigned rd = INSTR (4, 0);
9746
9747 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9748 aarch64_set_reg_u64
9749 (cpu, rd, NO_SP, aarch64_get_reg_u32 (cpu, rn, NO_SP)
9750 & ~ shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP), shift, count));
9751 }
9752
9753 /* 64 bit BIC shifted register. */
9754 static void
9755 bic64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9756 {
9757 unsigned rm = INSTR (20, 16);
9758 unsigned rn = INSTR (9, 5);
9759 unsigned rd = INSTR (4, 0);
9760
9761 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9762 aarch64_set_reg_u64
9763 (cpu, rd, NO_SP, aarch64_get_reg_u64 (cpu, rn, NO_SP)
9764 & ~ shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP), shift, count));
9765 }
9766
9767 /* 32 bit BIC shifted register setting flags. */
9768 static void
9769 bics32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9770 {
9771 unsigned rm = INSTR (20, 16);
9772 unsigned rn = INSTR (9, 5);
9773 unsigned rd = INSTR (4, 0);
9774
9775 uint32_t value1 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
9776 uint32_t value2 = ~ shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP),
9777 shift, count);
9778
9779 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9780 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 & value2);
9781 set_flags_for_binop32 (cpu, value1 & value2);
9782 }
9783
9784 /* 64 bit BIC shifted register setting flags. */
9785 static void
9786 bics64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9787 {
9788 unsigned rm = INSTR (20, 16);
9789 unsigned rn = INSTR (9, 5);
9790 unsigned rd = INSTR (4, 0);
9791
9792 uint64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
9793 uint64_t value2 = ~ shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP),
9794 shift, count);
9795
9796 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9797 aarch64_set_reg_u64 (cpu, rd, NO_SP, value1 & value2);
9798 set_flags_for_binop64 (cpu, value1 & value2);
9799 }
9800
9801 /* 32 bit EON shifted register. */
9802 static void
9803 eon32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9804 {
9805 unsigned rm = INSTR (20, 16);
9806 unsigned rn = INSTR (9, 5);
9807 unsigned rd = INSTR (4, 0);
9808
9809 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9810 aarch64_set_reg_u64
9811 (cpu, rd, NO_SP, aarch64_get_reg_u32 (cpu, rn, NO_SP)
9812 ^ ~ shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP), shift, count));
9813 }
9814
9815 /* 64 bit EON shifted register. */
9816 static void
9817 eon64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9818 {
9819 unsigned rm = INSTR (20, 16);
9820 unsigned rn = INSTR (9, 5);
9821 unsigned rd = INSTR (4, 0);
9822
9823 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9824 aarch64_set_reg_u64
9825 (cpu, rd, NO_SP, aarch64_get_reg_u64 (cpu, rn, NO_SP)
9826 ^ ~ shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP), shift, count));
9827 }
9828
9829 /* 32 bit EOR shifted register. */
9830 static void
9831 eor32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9832 {
9833 unsigned rm = INSTR (20, 16);
9834 unsigned rn = INSTR (9, 5);
9835 unsigned rd = INSTR (4, 0);
9836
9837 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9838 aarch64_set_reg_u64
9839 (cpu, rd, NO_SP, aarch64_get_reg_u32 (cpu, rn, NO_SP)
9840 ^ shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP), shift, count));
9841 }
9842
9843 /* 64 bit EOR shifted register. */
9844 static void
9845 eor64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9846 {
9847 unsigned rm = INSTR (20, 16);
9848 unsigned rn = INSTR (9, 5);
9849 unsigned rd = INSTR (4, 0);
9850
9851 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9852 aarch64_set_reg_u64
9853 (cpu, rd, NO_SP, aarch64_get_reg_u64 (cpu, rn, NO_SP)
9854 ^ shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP), shift, count));
9855 }
9856
9857 /* 32 bit ORR shifted register. */
9858 static void
9859 orr32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9860 {
9861 unsigned rm = INSTR (20, 16);
9862 unsigned rn = INSTR (9, 5);
9863 unsigned rd = INSTR (4, 0);
9864
9865 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9866 aarch64_set_reg_u64
9867 (cpu, rd, NO_SP, aarch64_get_reg_u32 (cpu, rn, NO_SP)
9868 | shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP), shift, count));
9869 }
9870
9871 /* 64 bit ORR shifted register. */
9872 static void
9873 orr64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9874 {
9875 unsigned rm = INSTR (20, 16);
9876 unsigned rn = INSTR (9, 5);
9877 unsigned rd = INSTR (4, 0);
9878
9879 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9880 aarch64_set_reg_u64
9881 (cpu, rd, NO_SP, aarch64_get_reg_u64 (cpu, rn, NO_SP)
9882 | shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP), shift, count));
9883 }
9884
9885 /* 32 bit ORN shifted register. */
9886 static void
9887 orn32_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9888 {
9889 unsigned rm = INSTR (20, 16);
9890 unsigned rn = INSTR (9, 5);
9891 unsigned rd = INSTR (4, 0);
9892
9893 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9894 aarch64_set_reg_u64
9895 (cpu, rd, NO_SP, aarch64_get_reg_u32 (cpu, rn, NO_SP)
9896 | ~ shifted32 (aarch64_get_reg_u32 (cpu, rm, NO_SP), shift, count));
9897 }
9898
9899 /* 64 bit ORN shifted register. */
9900 static void
9901 orn64_shift (sim_cpu *cpu, Shift shift, uint32_t count)
9902 {
9903 unsigned rm = INSTR (20, 16);
9904 unsigned rn = INSTR (9, 5);
9905 unsigned rd = INSTR (4, 0);
9906
9907 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9908 aarch64_set_reg_u64
9909 (cpu, rd, NO_SP, aarch64_get_reg_u64 (cpu, rn, NO_SP)
9910 | ~ shifted64 (aarch64_get_reg_u64 (cpu, rm, NO_SP), shift, count));
9911 }
9912
9913 static void
9914 dexLogicalImmediate (sim_cpu *cpu)
9915 {
9916 /* assert instr[28,23] = 1001000
9917 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
9918 instr[30,29] = op : 0 ==> AND, 1 ==> ORR, 2 ==> EOR, 3 ==> ANDS
9919 instr[22] = N : used to construct immediate mask
9920 instr[21,16] = immr
9921 instr[15,10] = imms
9922 instr[9,5] = Rn
9923 instr[4,0] = Rd */
9924
9925 /* 32 bit operations must have N = 0 or else we have an UNALLOC. */
9926 uint32_t size = INSTR (31, 31);
9927 uint32_t N = INSTR (22, 22);
9928 /* uint32_t immr = INSTR (21, 16);. */
9929 /* uint32_t imms = INSTR (15, 10);. */
9930 uint32_t index = INSTR (22, 10);
9931 uint64_t bimm64 = LITable [index];
9932 uint32_t dispatch = INSTR (30, 29);
9933
9934 if (~size & N)
9935 HALT_UNALLOC;
9936
9937 if (!bimm64)
9938 HALT_UNALLOC;
9939
9940 if (size == 0)
9941 {
9942 uint32_t bimm = (uint32_t) bimm64;
9943
9944 switch (dispatch)
9945 {
9946 case 0: and32 (cpu, bimm); return;
9947 case 1: orr32 (cpu, bimm); return;
9948 case 2: eor32 (cpu, bimm); return;
9949 case 3: ands32 (cpu, bimm); return;
9950 }
9951 }
9952 else
9953 {
9954 switch (dispatch)
9955 {
9956 case 0: and64 (cpu, bimm64); return;
9957 case 1: orr64 (cpu, bimm64); return;
9958 case 2: eor64 (cpu, bimm64); return;
9959 case 3: ands64 (cpu, bimm64); return;
9960 }
9961 }
9962 HALT_UNALLOC;
9963 }
9964
9965 /* Immediate move.
9966 The uimm argument is a 16 bit value to be inserted into the
9967 target register the pos argument locates the 16 bit word in the
9968 dest register i.e. it is in {0, 1} for 32 bit and {0, 1, 2,
9969 3} for 64 bit.
9970 N.B register arg may not be SP so it should be.
9971 accessed using the setGZRegisterXXX accessors. */
9972
9973 /* 32 bit move 16 bit immediate zero remaining shorts. */
9974 static void
9975 movz32 (sim_cpu *cpu, uint32_t val, uint32_t pos)
9976 {
9977 unsigned rd = INSTR (4, 0);
9978
9979 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9980 aarch64_set_reg_u64 (cpu, rd, NO_SP, val << (pos * 16));
9981 }
9982
9983 /* 64 bit move 16 bit immediate zero remaining shorts. */
9984 static void
9985 movz64 (sim_cpu *cpu, uint32_t val, uint32_t pos)
9986 {
9987 unsigned rd = INSTR (4, 0);
9988
9989 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
9990 aarch64_set_reg_u64 (cpu, rd, NO_SP, ((uint64_t) val) << (pos * 16));
9991 }
9992
9993 /* 32 bit move 16 bit immediate negated. */
9994 static void
9995 movn32 (sim_cpu *cpu, uint32_t val, uint32_t pos)
9996 {
9997 unsigned rd = INSTR (4, 0);
9998
9999 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10000 aarch64_set_reg_u64 (cpu, rd, NO_SP, ((val << (pos * 16)) ^ 0xffffffffU));
10001 }
10002
10003 /* 64 bit move 16 bit immediate negated. */
10004 static void
10005 movn64 (sim_cpu *cpu, uint32_t val, uint32_t pos)
10006 {
10007 unsigned rd = INSTR (4, 0);
10008
10009 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10010 aarch64_set_reg_u64
10011 (cpu, rd, NO_SP, ((((uint64_t) val) << (pos * 16))
10012 ^ 0xffffffffffffffffULL));
10013 }
10014
10015 /* 32 bit move 16 bit immediate keep remaining shorts. */
10016 static void
10017 movk32 (sim_cpu *cpu, uint32_t val, uint32_t pos)
10018 {
10019 unsigned rd = INSTR (4, 0);
10020 uint32_t current = aarch64_get_reg_u32 (cpu, rd, NO_SP);
10021 uint32_t value = val << (pos * 16);
10022 uint32_t mask = ~(0xffffU << (pos * 16));
10023
10024 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10025 aarch64_set_reg_u64 (cpu, rd, NO_SP, (value | (current & mask)));
10026 }
10027
10028 /* 64 bit move 16 it immediate keep remaining shorts. */
10029 static void
10030 movk64 (sim_cpu *cpu, uint32_t val, uint32_t pos)
10031 {
10032 unsigned rd = INSTR (4, 0);
10033 uint64_t current = aarch64_get_reg_u64 (cpu, rd, NO_SP);
10034 uint64_t value = (uint64_t) val << (pos * 16);
10035 uint64_t mask = ~(0xffffULL << (pos * 16));
10036
10037 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10038 aarch64_set_reg_u64 (cpu, rd, NO_SP, (value | (current & mask)));
10039 }
10040
10041 static void
10042 dexMoveWideImmediate (sim_cpu *cpu)
10043 {
10044 /* assert instr[28:23] = 100101
10045 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
10046 instr[30,29] = op : 0 ==> MOVN, 1 ==> UNALLOC, 2 ==> MOVZ, 3 ==> MOVK
10047 instr[22,21] = shift : 00 == LSL#0, 01 = LSL#16, 10 = LSL#32, 11 = LSL#48
10048 instr[20,5] = uimm16
10049 instr[4,0] = Rd */
10050
10051 /* N.B. the (multiple of 16) shift is applied by the called routine,
10052 we just pass the multiplier. */
10053
10054 uint32_t imm;
10055 uint32_t size = INSTR (31, 31);
10056 uint32_t op = INSTR (30, 29);
10057 uint32_t shift = INSTR (22, 21);
10058
10059 /* 32 bit can only shift 0 or 1 lot of 16.
10060 anything else is an unallocated instruction. */
10061 if (size == 0 && (shift > 1))
10062 HALT_UNALLOC;
10063
10064 if (op == 1)
10065 HALT_UNALLOC;
10066
10067 imm = INSTR (20, 5);
10068
10069 if (size == 0)
10070 {
10071 if (op == 0)
10072 movn32 (cpu, imm, shift);
10073 else if (op == 2)
10074 movz32 (cpu, imm, shift);
10075 else
10076 movk32 (cpu, imm, shift);
10077 }
10078 else
10079 {
10080 if (op == 0)
10081 movn64 (cpu, imm, shift);
10082 else if (op == 2)
10083 movz64 (cpu, imm, shift);
10084 else
10085 movk64 (cpu, imm, shift);
10086 }
10087 }
10088
10089 /* Bitfield operations.
10090 These take a pair of bit positions r and s which are in {0..31}
10091 or {0..63} depending on the instruction word size.
10092 N.B register args may not be SP. */
10093
10094 /* OK, we start with ubfm which just needs to pick
10095 some bits out of source zero the rest and write
10096 the result to dest. Just need two logical shifts. */
10097
10098 /* 32 bit bitfield move, left and right of affected zeroed
10099 if r <= s Wd<s-r:0> = Wn<s:r> else Wd<32+s-r,32-r> = Wn<s:0>. */
10100 static void
10101 ubfm32 (sim_cpu *cpu, uint32_t r, uint32_t s)
10102 {
10103 unsigned rd;
10104 unsigned rn = INSTR (9, 5);
10105 uint32_t value = aarch64_get_reg_u32 (cpu, rn, NO_SP);
10106
10107 /* Pick either s+1-r or s+1 consecutive bits out of the original word. */
10108 if (r <= s)
10109 {
10110 /* 31:...:s:xxx:r:...:0 ==> 31:...:s-r:xxx:0.
10111 We want only bits s:xxx:r at the bottom of the word
10112 so we LSL bit s up to bit 31 i.e. by 31 - s
10113 and then we LSR to bring bit 31 down to bit s - r
10114 i.e. by 31 + r - s. */
10115 value <<= 31 - s;
10116 value >>= 31 + r - s;
10117 }
10118 else
10119 {
10120 /* 31:...:s:xxx:0 ==> 31:...:31-(r-1)+s:xxx:31-(r-1):...:0
10121 We want only bits s:xxx:0 starting at it 31-(r-1)
10122 so we LSL bit s up to bit 31 i.e. by 31 - s
10123 and then we LSL to bring bit 31 down to 31-(r-1)+s
10124 i.e. by r - (s + 1). */
10125 value <<= 31 - s;
10126 value >>= r - (s + 1);
10127 }
10128
10129 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10130 rd = INSTR (4, 0);
10131 aarch64_set_reg_u64 (cpu, rd, NO_SP, value);
10132 }
10133
10134 /* 64 bit bitfield move, left and right of affected zeroed
10135 if r <= s Wd<s-r:0> = Wn<s:r> else Wd<64+s-r,64-r> = Wn<s:0>. */
10136 static void
10137 ubfm (sim_cpu *cpu, uint32_t r, uint32_t s)
10138 {
10139 unsigned rd;
10140 unsigned rn = INSTR (9, 5);
10141 uint64_t value = aarch64_get_reg_u64 (cpu, rn, NO_SP);
10142
10143 if (r <= s)
10144 {
10145 /* 63:...:s:xxx:r:...:0 ==> 63:...:s-r:xxx:0.
10146 We want only bits s:xxx:r at the bottom of the word.
10147 So we LSL bit s up to bit 63 i.e. by 63 - s
10148 and then we LSR to bring bit 63 down to bit s - r
10149 i.e. by 63 + r - s. */
10150 value <<= 63 - s;
10151 value >>= 63 + r - s;
10152 }
10153 else
10154 {
10155 /* 63:...:s:xxx:0 ==> 63:...:63-(r-1)+s:xxx:63-(r-1):...:0.
10156 We want only bits s:xxx:0 starting at it 63-(r-1).
10157 So we LSL bit s up to bit 63 i.e. by 63 - s
10158 and then we LSL to bring bit 63 down to 63-(r-1)+s
10159 i.e. by r - (s + 1). */
10160 value <<= 63 - s;
10161 value >>= r - (s + 1);
10162 }
10163
10164 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10165 rd = INSTR (4, 0);
10166 aarch64_set_reg_u64 (cpu, rd, NO_SP, value);
10167 }
10168
10169 /* The signed versions need to insert sign bits
10170 on the left of the inserted bit field. so we do
10171 much the same as the unsigned version except we
10172 use an arithmetic shift right -- this just means
10173 we need to operate on signed values. */
10174
10175 /* 32 bit bitfield move, left of affected sign-extended, right zeroed. */
10176 /* If r <= s Wd<s-r:0> = Wn<s:r> else Wd<32+s-r,32-r> = Wn<s:0>. */
10177 static void
10178 sbfm32 (sim_cpu *cpu, uint32_t r, uint32_t s)
10179 {
10180 unsigned rd;
10181 unsigned rn = INSTR (9, 5);
10182 /* as per ubfm32 but use an ASR instead of an LSR. */
10183 int32_t value = aarch64_get_reg_s32 (cpu, rn, NO_SP);
10184
10185 if (r <= s)
10186 {
10187 value <<= 31 - s;
10188 value >>= 31 + r - s;
10189 }
10190 else
10191 {
10192 value <<= 31 - s;
10193 value >>= r - (s + 1);
10194 }
10195
10196 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10197 rd = INSTR (4, 0);
10198 aarch64_set_reg_u64 (cpu, rd, NO_SP, (uint32_t) value);
10199 }
10200
10201 /* 64 bit bitfield move, left of affected sign-extended, right zeroed. */
10202 /* If r <= s Wd<s-r:0> = Wn<s:r> else Wd<64+s-r,64-r> = Wn<s:0>. */
10203 static void
10204 sbfm (sim_cpu *cpu, uint32_t r, uint32_t s)
10205 {
10206 unsigned rd;
10207 unsigned rn = INSTR (9, 5);
10208 /* acpu per ubfm but use an ASR instead of an LSR. */
10209 int64_t value = aarch64_get_reg_s64 (cpu, rn, NO_SP);
10210
10211 if (r <= s)
10212 {
10213 value <<= 63 - s;
10214 value >>= 63 + r - s;
10215 }
10216 else
10217 {
10218 value <<= 63 - s;
10219 value >>= r - (s + 1);
10220 }
10221
10222 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10223 rd = INSTR (4, 0);
10224 aarch64_set_reg_s64 (cpu, rd, NO_SP, value);
10225 }
10226
10227 /* Finally, these versions leave non-affected bits
10228 as is. so we need to generate the bits as per
10229 ubfm and also generate a mask to pick the
10230 bits from the original and computed values. */
10231
10232 /* 32 bit bitfield move, non-affected bits left as is.
10233 If r <= s Wd<s-r:0> = Wn<s:r> else Wd<32+s-r,32-r> = Wn<s:0>. */
10234 static void
10235 bfm32 (sim_cpu *cpu, uint32_t r, uint32_t s)
10236 {
10237 unsigned rn = INSTR (9, 5);
10238 uint32_t value = aarch64_get_reg_u32 (cpu, rn, NO_SP);
10239 uint32_t mask = -1;
10240 unsigned rd;
10241 uint32_t value2;
10242
10243 /* Pick either s+1-r or s+1 consecutive bits out of the original word. */
10244 if (r <= s)
10245 {
10246 /* 31:...:s:xxx:r:...:0 ==> 31:...:s-r:xxx:0.
10247 We want only bits s:xxx:r at the bottom of the word
10248 so we LSL bit s up to bit 31 i.e. by 31 - s
10249 and then we LSR to bring bit 31 down to bit s - r
10250 i.e. by 31 + r - s. */
10251 value <<= 31 - s;
10252 value >>= 31 + r - s;
10253 /* the mask must include the same bits. */
10254 mask <<= 31 - s;
10255 mask >>= 31 + r - s;
10256 }
10257 else
10258 {
10259 /* 31:...:s:xxx:0 ==> 31:...:31-(r-1)+s:xxx:31-(r-1):...:0.
10260 We want only bits s:xxx:0 starting at it 31-(r-1)
10261 so we LSL bit s up to bit 31 i.e. by 31 - s
10262 and then we LSL to bring bit 31 down to 31-(r-1)+s
10263 i.e. by r - (s + 1). */
10264 value <<= 31 - s;
10265 value >>= r - (s + 1);
10266 /* The mask must include the same bits. */
10267 mask <<= 31 - s;
10268 mask >>= r - (s + 1);
10269 }
10270
10271 rd = INSTR (4, 0);
10272 value2 = aarch64_get_reg_u32 (cpu, rd, NO_SP);
10273
10274 value2 &= ~mask;
10275 value2 |= value;
10276
10277 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10278 aarch64_set_reg_u64
10279 (cpu, rd, NO_SP, (aarch64_get_reg_u32 (cpu, rd, NO_SP) & ~mask) | value);
10280 }
10281
10282 /* 64 bit bitfield move, non-affected bits left as is.
10283 If r <= s Wd<s-r:0> = Wn<s:r> else Wd<64+s-r,64-r> = Wn<s:0>. */
10284 static void
10285 bfm (sim_cpu *cpu, uint32_t r, uint32_t s)
10286 {
10287 unsigned rd;
10288 unsigned rn = INSTR (9, 5);
10289 uint64_t value = aarch64_get_reg_u64 (cpu, rn, NO_SP);
10290 uint64_t mask = 0xffffffffffffffffULL;
10291
10292 if (r <= s)
10293 {
10294 /* 63:...:s:xxx:r:...:0 ==> 63:...:s-r:xxx:0.
10295 We want only bits s:xxx:r at the bottom of the word
10296 so we LSL bit s up to bit 63 i.e. by 63 - s
10297 and then we LSR to bring bit 63 down to bit s - r
10298 i.e. by 63 + r - s. */
10299 value <<= 63 - s;
10300 value >>= 63 + r - s;
10301 /* The mask must include the same bits. */
10302 mask <<= 63 - s;
10303 mask >>= 63 + r - s;
10304 }
10305 else
10306 {
10307 /* 63:...:s:xxx:0 ==> 63:...:63-(r-1)+s:xxx:63-(r-1):...:0
10308 We want only bits s:xxx:0 starting at it 63-(r-1)
10309 so we LSL bit s up to bit 63 i.e. by 63 - s
10310 and then we LSL to bring bit 63 down to 63-(r-1)+s
10311 i.e. by r - (s + 1). */
10312 value <<= 63 - s;
10313 value >>= r - (s + 1);
10314 /* The mask must include the same bits. */
10315 mask <<= 63 - s;
10316 mask >>= r - (s + 1);
10317 }
10318
10319 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10320 rd = INSTR (4, 0);
10321 aarch64_set_reg_u64
10322 (cpu, rd, NO_SP, (aarch64_get_reg_u64 (cpu, rd, NO_SP) & ~mask) | value);
10323 }
10324
10325 static void
10326 dexBitfieldImmediate (sim_cpu *cpu)
10327 {
10328 /* assert instr[28:23] = 100110
10329 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
10330 instr[30,29] = op : 0 ==> SBFM, 1 ==> BFM, 2 ==> UBFM, 3 ==> UNALLOC
10331 instr[22] = N : must be 0 for 32 bit, 1 for 64 bit ow UNALLOC
10332 instr[21,16] = immr : 0xxxxx for 32 bit, xxxxxx for 64 bit
10333 instr[15,10] = imms : 0xxxxx for 32 bit, xxxxxx for 64 bit
10334 instr[9,5] = Rn
10335 instr[4,0] = Rd */
10336
10337 /* 32 bit operations must have N = 0 or else we have an UNALLOC. */
10338 uint32_t dispatch;
10339 uint32_t imms;
10340 uint32_t size = INSTR (31, 31);
10341 uint32_t N = INSTR (22, 22);
10342 /* 32 bit operations must have immr[5] = 0 and imms[5] = 0. */
10343 /* or else we have an UNALLOC. */
10344 uint32_t immr = INSTR (21, 16);
10345
10346 if (~size & N)
10347 HALT_UNALLOC;
10348
10349 if (!size && uimm (immr, 5, 5))
10350 HALT_UNALLOC;
10351
10352 imms = INSTR (15, 10);
10353 if (!size && uimm (imms, 5, 5))
10354 HALT_UNALLOC;
10355
10356 /* Switch on combined size and op. */
10357 dispatch = INSTR (31, 29);
10358 switch (dispatch)
10359 {
10360 case 0: sbfm32 (cpu, immr, imms); return;
10361 case 1: bfm32 (cpu, immr, imms); return;
10362 case 2: ubfm32 (cpu, immr, imms); return;
10363 case 4: sbfm (cpu, immr, imms); return;
10364 case 5: bfm (cpu, immr, imms); return;
10365 case 6: ubfm (cpu, immr, imms); return;
10366 default: HALT_UNALLOC;
10367 }
10368 }
10369
10370 static void
10371 do_EXTR_32 (sim_cpu *cpu)
10372 {
10373 /* instr[31:21] = 00010011100
10374 instr[20,16] = Rm
10375 instr[15,10] = imms : 0xxxxx for 32 bit
10376 instr[9,5] = Rn
10377 instr[4,0] = Rd */
10378 unsigned rm = INSTR (20, 16);
10379 unsigned imms = INSTR (15, 10) & 31;
10380 unsigned rn = INSTR ( 9, 5);
10381 unsigned rd = INSTR ( 4, 0);
10382 uint64_t val1;
10383 uint64_t val2;
10384
10385 val1 = aarch64_get_reg_u32 (cpu, rm, NO_SP);
10386 val1 >>= imms;
10387 val2 = aarch64_get_reg_u32 (cpu, rn, NO_SP);
10388 val2 <<= (32 - imms);
10389
10390 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
10391 aarch64_set_reg_u64 (cpu, rd, NO_SP, val1 | val2);
10392 }
10393
10394 static void
10395 do_EXTR_64 (sim_cpu *cpu)
10396 {
10397 /* instr[31:21] = 10010011100
10398 instr[20,16] = Rm
10399 instr[15,10] = imms
10400 instr[9,5] = Rn
10401 instr[4,0] = Rd */
10402 unsigned rm = INSTR (20, 16);
10403 unsigned imms = INSTR (15, 10) & 63;
10404 unsigned rn = INSTR ( 9, 5);
10405 unsigned rd = INSTR ( 4, 0);
10406 uint64_t val;
10407
10408 val = aarch64_get_reg_u64 (cpu, rm, NO_SP);
10409 val >>= imms;
10410 val |= (aarch64_get_reg_u64 (cpu, rn, NO_SP) << (64 - imms));
10411
10412 aarch64_set_reg_u64 (cpu, rd, NO_SP, val);
10413 }
10414
10415 static void
10416 dexExtractImmediate (sim_cpu *cpu)
10417 {
10418 /* assert instr[28:23] = 100111
10419 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
10420 instr[30,29] = op21 : 0 ==> EXTR, 1,2,3 ==> UNALLOC
10421 instr[22] = N : must be 0 for 32 bit, 1 for 64 bit or UNALLOC
10422 instr[21] = op0 : must be 0 or UNALLOC
10423 instr[20,16] = Rm
10424 instr[15,10] = imms : 0xxxxx for 32 bit, xxxxxx for 64 bit
10425 instr[9,5] = Rn
10426 instr[4,0] = Rd */
10427
10428 /* 32 bit operations must have N = 0 or else we have an UNALLOC. */
10429 /* 64 bit operations must have N = 1 or else we have an UNALLOC. */
10430 uint32_t dispatch;
10431 uint32_t size = INSTR (31, 31);
10432 uint32_t N = INSTR (22, 22);
10433 /* 32 bit operations must have imms[5] = 0
10434 or else we have an UNALLOC. */
10435 uint32_t imms = INSTR (15, 10);
10436
10437 if (size ^ N)
10438 HALT_UNALLOC;
10439
10440 if (!size && uimm (imms, 5, 5))
10441 HALT_UNALLOC;
10442
10443 /* Switch on combined size and op. */
10444 dispatch = INSTR (31, 29);
10445
10446 if (dispatch == 0)
10447 do_EXTR_32 (cpu);
10448
10449 else if (dispatch == 4)
10450 do_EXTR_64 (cpu);
10451
10452 else if (dispatch == 1)
10453 HALT_NYI;
10454 else
10455 HALT_UNALLOC;
10456 }
10457
10458 static void
10459 dexDPImm (sim_cpu *cpu)
10460 {
10461 /* uint32_t group = dispatchGroup (aarch64_get_instr (cpu));
10462 assert group == GROUP_DPIMM_1000 || grpoup == GROUP_DPIMM_1001
10463 bits [25,23] of a DPImm are the secondary dispatch vector. */
10464 uint32_t group2 = dispatchDPImm (aarch64_get_instr (cpu));
10465
10466 switch (group2)
10467 {
10468 case DPIMM_PCADR_000:
10469 case DPIMM_PCADR_001:
10470 dexPCRelAddressing (cpu);
10471 return;
10472
10473 case DPIMM_ADDSUB_010:
10474 case DPIMM_ADDSUB_011:
10475 dexAddSubtractImmediate (cpu);
10476 return;
10477
10478 case DPIMM_LOG_100:
10479 dexLogicalImmediate (cpu);
10480 return;
10481
10482 case DPIMM_MOV_101:
10483 dexMoveWideImmediate (cpu);
10484 return;
10485
10486 case DPIMM_BITF_110:
10487 dexBitfieldImmediate (cpu);
10488 return;
10489
10490 case DPIMM_EXTR_111:
10491 dexExtractImmediate (cpu);
10492 return;
10493
10494 default:
10495 /* Should never reach here. */
10496 HALT_NYI;
10497 }
10498 }
10499
10500 static void
10501 dexLoadUnscaledImmediate (sim_cpu *cpu)
10502 {
10503 /* instr[29,24] == 111_00
10504 instr[21] == 0
10505 instr[11,10] == 00
10506 instr[31,30] = size
10507 instr[26] = V
10508 instr[23,22] = opc
10509 instr[20,12] = simm9
10510 instr[9,5] = rn may be SP. */
10511 /* unsigned rt = INSTR (4, 0); */
10512 uint32_t V = INSTR (26, 26);
10513 uint32_t dispatch = ((INSTR (31, 30) << 2) | INSTR (23, 22));
10514 int32_t imm = simm32 (aarch64_get_instr (cpu), 20, 12);
10515
10516 if (!V)
10517 {
10518 /* GReg operations. */
10519 switch (dispatch)
10520 {
10521 case 0: sturb (cpu, imm); return;
10522 case 1: ldurb32 (cpu, imm); return;
10523 case 2: ldursb64 (cpu, imm); return;
10524 case 3: ldursb32 (cpu, imm); return;
10525 case 4: sturh (cpu, imm); return;
10526 case 5: ldurh32 (cpu, imm); return;
10527 case 6: ldursh64 (cpu, imm); return;
10528 case 7: ldursh32 (cpu, imm); return;
10529 case 8: stur32 (cpu, imm); return;
10530 case 9: ldur32 (cpu, imm); return;
10531 case 10: ldursw (cpu, imm); return;
10532 case 12: stur64 (cpu, imm); return;
10533 case 13: ldur64 (cpu, imm); return;
10534
10535 case 14:
10536 /* PRFUM NYI. */
10537 HALT_NYI;
10538
10539 default:
10540 case 11:
10541 case 15:
10542 HALT_UNALLOC;
10543 }
10544 }
10545
10546 /* FReg operations. */
10547 switch (dispatch)
10548 {
10549 case 2: fsturq (cpu, imm); return;
10550 case 3: fldurq (cpu, imm); return;
10551 case 8: fsturs (cpu, imm); return;
10552 case 9: fldurs (cpu, imm); return;
10553 case 12: fsturd (cpu, imm); return;
10554 case 13: fldurd (cpu, imm); return;
10555
10556 case 0: /* STUR 8 bit FP. */
10557 case 1: /* LDUR 8 bit FP. */
10558 case 4: /* STUR 16 bit FP. */
10559 case 5: /* LDUR 8 bit FP. */
10560 HALT_NYI;
10561
10562 default:
10563 case 6:
10564 case 7:
10565 case 10:
10566 case 11:
10567 case 14:
10568 case 15:
10569 HALT_UNALLOC;
10570 }
10571 }
10572
10573 /* N.B. A preliminary note regarding all the ldrs<x>32
10574 instructions
10575
10576 The signed value loaded by these instructions is cast to unsigned
10577 before being assigned to aarch64_get_reg_u64 (cpu, N) i.e. to the
10578 64 bit element of the GReg union. this performs a 32 bit sign extension
10579 (as required) but avoids 64 bit sign extension, thus ensuring that the
10580 top half of the register word is zero. this is what the spec demands
10581 when a 32 bit load occurs. */
10582
10583 /* 32 bit load sign-extended byte scaled unsigned 12 bit. */
10584 static void
10585 ldrsb32_abs (sim_cpu *cpu, uint32_t offset)
10586 {
10587 unsigned int rn = INSTR (9, 5);
10588 unsigned int rt = INSTR (4, 0);
10589
10590 /* The target register may not be SP but the source may be
10591 there is no scaling required for a byte load. */
10592 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset;
10593 aarch64_set_reg_u64 (cpu, rt, NO_SP,
10594 (int64_t) aarch64_get_mem_s8 (cpu, address));
10595 }
10596
10597 /* 32 bit load sign-extended byte scaled or unscaled zero-
10598 or sign-extended 32-bit register offset. */
10599 static void
10600 ldrsb32_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
10601 {
10602 unsigned int rm = INSTR (20, 16);
10603 unsigned int rn = INSTR (9, 5);
10604 unsigned int rt = INSTR (4, 0);
10605
10606 /* rn may reference SP, rm and rt must reference ZR. */
10607
10608 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10609 int64_t displacement = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
10610 extension);
10611
10612 /* There is no scaling required for a byte load. */
10613 aarch64_set_reg_u64
10614 (cpu, rt, NO_SP, (int64_t) aarch64_get_mem_s8 (cpu, address
10615 + displacement));
10616 }
10617
10618 /* 32 bit load sign-extended byte unscaled signed 9 bit with
10619 pre- or post-writeback. */
10620 static void
10621 ldrsb32_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
10622 {
10623 uint64_t address;
10624 unsigned int rn = INSTR (9, 5);
10625 unsigned int rt = INSTR (4, 0);
10626
10627 if (rn == rt && wb != NoWriteBack)
10628 HALT_UNALLOC;
10629
10630 address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10631
10632 if (wb == Pre)
10633 address += offset;
10634
10635 aarch64_set_reg_u64 (cpu, rt, NO_SP,
10636 (int64_t) aarch64_get_mem_s8 (cpu, address));
10637
10638 if (wb == Post)
10639 address += offset;
10640
10641 if (wb != NoWriteBack)
10642 aarch64_set_reg_u64 (cpu, rn, NO_SP, address);
10643 }
10644
10645 /* 8 bit store scaled. */
10646 static void
10647 fstrb_abs (sim_cpu *cpu, uint32_t offset)
10648 {
10649 unsigned st = INSTR (4, 0);
10650 unsigned rn = INSTR (9, 5);
10651
10652 aarch64_set_mem_u8 (cpu,
10653 aarch64_get_reg_u64 (cpu, rn, SP_OK) + offset,
10654 aarch64_get_vec_u8 (cpu, st, 0));
10655 }
10656
10657 /* 8 bit store scaled or unscaled zero- or
10658 sign-extended 8-bit register offset. */
10659 static void
10660 fstrb_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
10661 {
10662 unsigned rm = INSTR (20, 16);
10663 unsigned rn = INSTR (9, 5);
10664 unsigned st = INSTR (4, 0);
10665
10666 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10667 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
10668 extension);
10669 uint64_t displacement = scaling == Scaled ? extended : 0;
10670
10671 aarch64_set_mem_u8
10672 (cpu, address + displacement, aarch64_get_vec_u8 (cpu, st, 0));
10673 }
10674
10675 /* 16 bit store scaled. */
10676 static void
10677 fstrh_abs (sim_cpu *cpu, uint32_t offset)
10678 {
10679 unsigned st = INSTR (4, 0);
10680 unsigned rn = INSTR (9, 5);
10681
10682 aarch64_set_mem_u16
10683 (cpu,
10684 aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 16),
10685 aarch64_get_vec_u16 (cpu, st, 0));
10686 }
10687
10688 /* 16 bit store scaled or unscaled zero-
10689 or sign-extended 16-bit register offset. */
10690 static void
10691 fstrh_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
10692 {
10693 unsigned rm = INSTR (20, 16);
10694 unsigned rn = INSTR (9, 5);
10695 unsigned st = INSTR (4, 0);
10696
10697 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10698 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
10699 extension);
10700 uint64_t displacement = OPT_SCALE (extended, 16, scaling);
10701
10702 aarch64_set_mem_u16
10703 (cpu, address + displacement, aarch64_get_vec_u16 (cpu, st, 0));
10704 }
10705
10706 /* 32 bit store scaled unsigned 12 bit. */
10707 static void
10708 fstrs_abs (sim_cpu *cpu, uint32_t offset)
10709 {
10710 unsigned st = INSTR (4, 0);
10711 unsigned rn = INSTR (9, 5);
10712
10713 aarch64_set_mem_u32
10714 (cpu,
10715 aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 32),
10716 aarch64_get_vec_u32 (cpu, st, 0));
10717 }
10718
10719 /* 32 bit store unscaled signed 9 bit with pre- or post-writeback. */
10720 static void
10721 fstrs_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
10722 {
10723 unsigned rn = INSTR (9, 5);
10724 unsigned st = INSTR (4, 0);
10725
10726 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10727
10728 if (wb != Post)
10729 address += offset;
10730
10731 aarch64_set_mem_u32 (cpu, address, aarch64_get_vec_u32 (cpu, st, 0));
10732
10733 if (wb == Post)
10734 address += offset;
10735
10736 if (wb != NoWriteBack)
10737 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
10738 }
10739
10740 /* 32 bit store scaled or unscaled zero-
10741 or sign-extended 32-bit register offset. */
10742 static void
10743 fstrs_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
10744 {
10745 unsigned rm = INSTR (20, 16);
10746 unsigned rn = INSTR (9, 5);
10747 unsigned st = INSTR (4, 0);
10748
10749 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10750 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
10751 extension);
10752 uint64_t displacement = OPT_SCALE (extended, 32, scaling);
10753
10754 aarch64_set_mem_u32
10755 (cpu, address + displacement, aarch64_get_vec_u32 (cpu, st, 0));
10756 }
10757
10758 /* 64 bit store scaled unsigned 12 bit. */
10759 static void
10760 fstrd_abs (sim_cpu *cpu, uint32_t offset)
10761 {
10762 unsigned st = INSTR (4, 0);
10763 unsigned rn = INSTR (9, 5);
10764
10765 aarch64_set_mem_u64
10766 (cpu,
10767 aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 64),
10768 aarch64_get_vec_u64 (cpu, st, 0));
10769 }
10770
10771 /* 64 bit store unscaled signed 9 bit with pre- or post-writeback. */
10772 static void
10773 fstrd_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
10774 {
10775 unsigned rn = INSTR (9, 5);
10776 unsigned st = INSTR (4, 0);
10777
10778 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10779
10780 if (wb != Post)
10781 address += offset;
10782
10783 aarch64_set_mem_u64 (cpu, address, aarch64_get_vec_u64 (cpu, st, 0));
10784
10785 if (wb == Post)
10786 address += offset;
10787
10788 if (wb != NoWriteBack)
10789 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
10790 }
10791
10792 /* 64 bit store scaled or unscaled zero-
10793 or sign-extended 32-bit register offset. */
10794 static void
10795 fstrd_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
10796 {
10797 unsigned rm = INSTR (20, 16);
10798 unsigned rn = INSTR (9, 5);
10799 unsigned st = INSTR (4, 0);
10800
10801 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10802 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
10803 extension);
10804 uint64_t displacement = OPT_SCALE (extended, 64, scaling);
10805
10806 aarch64_set_mem_u64
10807 (cpu, address + displacement, aarch64_get_vec_u64 (cpu, st, 0));
10808 }
10809
10810 /* 128 bit store scaled unsigned 12 bit. */
10811 static void
10812 fstrq_abs (sim_cpu *cpu, uint32_t offset)
10813 {
10814 FRegister a;
10815 unsigned st = INSTR (4, 0);
10816 unsigned rn = INSTR (9, 5);
10817 uint64_t addr;
10818
10819 aarch64_get_FP_long_double (cpu, st, & a);
10820
10821 addr = aarch64_get_reg_u64 (cpu, rn, SP_OK) + SCALE (offset, 128);
10822 aarch64_set_mem_long_double (cpu, addr, a);
10823 }
10824
10825 /* 128 bit store unscaled signed 9 bit with pre- or post-writeback. */
10826 static void
10827 fstrq_wb (sim_cpu *cpu, int32_t offset, WriteBack wb)
10828 {
10829 FRegister a;
10830 unsigned rn = INSTR (9, 5);
10831 unsigned st = INSTR (4, 0);
10832 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10833
10834 if (wb != Post)
10835 address += offset;
10836
10837 aarch64_get_FP_long_double (cpu, st, & a);
10838 aarch64_set_mem_long_double (cpu, address, a);
10839
10840 if (wb == Post)
10841 address += offset;
10842
10843 if (wb != NoWriteBack)
10844 aarch64_set_reg_u64 (cpu, rn, SP_OK, address);
10845 }
10846
10847 /* 128 bit store scaled or unscaled zero-
10848 or sign-extended 32-bit register offset. */
10849 static void
10850 fstrq_scale_ext (sim_cpu *cpu, Scaling scaling, Extension extension)
10851 {
10852 unsigned rm = INSTR (20, 16);
10853 unsigned rn = INSTR (9, 5);
10854 unsigned st = INSTR (4, 0);
10855
10856 uint64_t address = aarch64_get_reg_u64 (cpu, rn, SP_OK);
10857 int64_t extended = extend (aarch64_get_reg_u32 (cpu, rm, NO_SP),
10858 extension);
10859 uint64_t displacement = OPT_SCALE (extended, 128, scaling);
10860
10861 FRegister a;
10862
10863 aarch64_get_FP_long_double (cpu, st, & a);
10864 aarch64_set_mem_long_double (cpu, address + displacement, a);
10865 }
10866
10867 static void
10868 dexLoadImmediatePrePost (sim_cpu *cpu)
10869 {
10870 /* instr[31,30] = size
10871 instr[29,27] = 111
10872 instr[26] = V
10873 instr[25,24] = 00
10874 instr[23,22] = opc
10875 instr[21] = 0
10876 instr[20,12] = simm9
10877 instr[11] = wb : 0 ==> Post, 1 ==> Pre
10878 instr[10] = 0
10879 instr[9,5] = Rn may be SP.
10880 instr[4,0] = Rt */
10881
10882 uint32_t V = INSTR (26, 26);
10883 uint32_t dispatch = ((INSTR (31, 30) << 2) | INSTR (23, 22));
10884 int32_t imm = simm32 (aarch64_get_instr (cpu), 20, 12);
10885 WriteBack wb = INSTR (11, 11);
10886
10887 if (!V)
10888 {
10889 /* GReg operations. */
10890 switch (dispatch)
10891 {
10892 case 0: strb_wb (cpu, imm, wb); return;
10893 case 1: ldrb32_wb (cpu, imm, wb); return;
10894 case 2: ldrsb_wb (cpu, imm, wb); return;
10895 case 3: ldrsb32_wb (cpu, imm, wb); return;
10896 case 4: strh_wb (cpu, imm, wb); return;
10897 case 5: ldrh32_wb (cpu, imm, wb); return;
10898 case 6: ldrsh64_wb (cpu, imm, wb); return;
10899 case 7: ldrsh32_wb (cpu, imm, wb); return;
10900 case 8: str32_wb (cpu, imm, wb); return;
10901 case 9: ldr32_wb (cpu, imm, wb); return;
10902 case 10: ldrsw_wb (cpu, imm, wb); return;
10903 case 12: str_wb (cpu, imm, wb); return;
10904 case 13: ldr_wb (cpu, imm, wb); return;
10905
10906 default:
10907 case 11:
10908 case 14:
10909 case 15:
10910 HALT_UNALLOC;
10911 }
10912 }
10913
10914 /* FReg operations. */
10915 switch (dispatch)
10916 {
10917 case 2: fstrq_wb (cpu, imm, wb); return;
10918 case 3: fldrq_wb (cpu, imm, wb); return;
10919 case 8: fstrs_wb (cpu, imm, wb); return;
10920 case 9: fldrs_wb (cpu, imm, wb); return;
10921 case 12: fstrd_wb (cpu, imm, wb); return;
10922 case 13: fldrd_wb (cpu, imm, wb); return;
10923
10924 case 0: /* STUR 8 bit FP. */
10925 case 1: /* LDUR 8 bit FP. */
10926 case 4: /* STUR 16 bit FP. */
10927 case 5: /* LDUR 8 bit FP. */
10928 HALT_NYI;
10929
10930 default:
10931 case 6:
10932 case 7:
10933 case 10:
10934 case 11:
10935 case 14:
10936 case 15:
10937 HALT_UNALLOC;
10938 }
10939 }
10940
10941 static void
10942 dexLoadRegisterOffset (sim_cpu *cpu)
10943 {
10944 /* instr[31,30] = size
10945 instr[29,27] = 111
10946 instr[26] = V
10947 instr[25,24] = 00
10948 instr[23,22] = opc
10949 instr[21] = 1
10950 instr[20,16] = rm
10951 instr[15,13] = option : 010 ==> UXTW, 011 ==> UXTX/LSL,
10952 110 ==> SXTW, 111 ==> SXTX,
10953 ow ==> RESERVED
10954 instr[12] = scaled
10955 instr[11,10] = 10
10956 instr[9,5] = rn
10957 instr[4,0] = rt. */
10958
10959 uint32_t V = INSTR (26, 26);
10960 uint32_t dispatch = ((INSTR (31, 30) << 2) | INSTR (23, 22));
10961 Scaling scale = INSTR (12, 12);
10962 Extension extensionType = INSTR (15, 13);
10963
10964 /* Check for illegal extension types. */
10965 if (uimm (extensionType, 1, 1) == 0)
10966 HALT_UNALLOC;
10967
10968 if (extensionType == UXTX || extensionType == SXTX)
10969 extensionType = NoExtension;
10970
10971 if (!V)
10972 {
10973 /* GReg operations. */
10974 switch (dispatch)
10975 {
10976 case 0: strb_scale_ext (cpu, scale, extensionType); return;
10977 case 1: ldrb32_scale_ext (cpu, scale, extensionType); return;
10978 case 2: ldrsb_scale_ext (cpu, scale, extensionType); return;
10979 case 3: ldrsb32_scale_ext (cpu, scale, extensionType); return;
10980 case 4: strh_scale_ext (cpu, scale, extensionType); return;
10981 case 5: ldrh32_scale_ext (cpu, scale, extensionType); return;
10982 case 6: ldrsh_scale_ext (cpu, scale, extensionType); return;
10983 case 7: ldrsh32_scale_ext (cpu, scale, extensionType); return;
10984 case 8: str32_scale_ext (cpu, scale, extensionType); return;
10985 case 9: ldr32_scale_ext (cpu, scale, extensionType); return;
10986 case 10: ldrsw_scale_ext (cpu, scale, extensionType); return;
10987 case 12: str_scale_ext (cpu, scale, extensionType); return;
10988 case 13: ldr_scale_ext (cpu, scale, extensionType); return;
10989 case 14: prfm_scale_ext (cpu, scale, extensionType); return;
10990
10991 default:
10992 case 11:
10993 case 15:
10994 HALT_UNALLOC;
10995 }
10996 }
10997
10998 /* FReg operations. */
10999 switch (dispatch)
11000 {
11001 case 1: /* LDUR 8 bit FP. */
11002 HALT_NYI;
11003 case 3: fldrq_scale_ext (cpu, scale, extensionType); return;
11004 case 5: /* LDUR 8 bit FP. */
11005 HALT_NYI;
11006 case 9: fldrs_scale_ext (cpu, scale, extensionType); return;
11007 case 13: fldrd_scale_ext (cpu, scale, extensionType); return;
11008
11009 case 0: fstrb_scale_ext (cpu, scale, extensionType); return;
11010 case 2: fstrq_scale_ext (cpu, scale, extensionType); return;
11011 case 4: fstrh_scale_ext (cpu, scale, extensionType); return;
11012 case 8: fstrs_scale_ext (cpu, scale, extensionType); return;
11013 case 12: fstrd_scale_ext (cpu, scale, extensionType); return;
11014
11015 default:
11016 case 6:
11017 case 7:
11018 case 10:
11019 case 11:
11020 case 14:
11021 case 15:
11022 HALT_UNALLOC;
11023 }
11024 }
11025
11026 static void
11027 dexLoadUnsignedImmediate (sim_cpu *cpu)
11028 {
11029 /* instr[29,24] == 111_01
11030 instr[31,30] = size
11031 instr[26] = V
11032 instr[23,22] = opc
11033 instr[21,10] = uimm12 : unsigned immediate offset
11034 instr[9,5] = rn may be SP.
11035 instr[4,0] = rt. */
11036
11037 uint32_t V = INSTR (26,26);
11038 uint32_t dispatch = ((INSTR (31, 30) << 2) | INSTR (23, 22));
11039 uint32_t imm = INSTR (21, 10);
11040
11041 if (!V)
11042 {
11043 /* GReg operations. */
11044 switch (dispatch)
11045 {
11046 case 0: strb_abs (cpu, imm); return;
11047 case 1: ldrb32_abs (cpu, imm); return;
11048 case 2: ldrsb_abs (cpu, imm); return;
11049 case 3: ldrsb32_abs (cpu, imm); return;
11050 case 4: strh_abs (cpu, imm); return;
11051 case 5: ldrh32_abs (cpu, imm); return;
11052 case 6: ldrsh_abs (cpu, imm); return;
11053 case 7: ldrsh32_abs (cpu, imm); return;
11054 case 8: str32_abs (cpu, imm); return;
11055 case 9: ldr32_abs (cpu, imm); return;
11056 case 10: ldrsw_abs (cpu, imm); return;
11057 case 12: str_abs (cpu, imm); return;
11058 case 13: ldr_abs (cpu, imm); return;
11059 case 14: prfm_abs (cpu, imm); return;
11060
11061 default:
11062 case 11:
11063 case 15:
11064 HALT_UNALLOC;
11065 }
11066 }
11067
11068 /* FReg operations. */
11069 switch (dispatch)
11070 {
11071 case 0: fstrb_abs (cpu, imm); return;
11072 case 4: fstrh_abs (cpu, imm); return;
11073 case 8: fstrs_abs (cpu, imm); return;
11074 case 12: fstrd_abs (cpu, imm); return;
11075 case 2: fstrq_abs (cpu, imm); return;
11076
11077 case 1: fldrb_abs (cpu, imm); return;
11078 case 5: fldrh_abs (cpu, imm); return;
11079 case 9: fldrs_abs (cpu, imm); return;
11080 case 13: fldrd_abs (cpu, imm); return;
11081 case 3: fldrq_abs (cpu, imm); return;
11082
11083 default:
11084 case 6:
11085 case 7:
11086 case 10:
11087 case 11:
11088 case 14:
11089 case 15:
11090 HALT_UNALLOC;
11091 }
11092 }
11093
11094 static void
11095 dexLoadExclusive (sim_cpu *cpu)
11096 {
11097 /* assert instr[29:24] = 001000;
11098 instr[31,30] = size
11099 instr[23] = 0 if exclusive
11100 instr[22] = L : 1 if load, 0 if store
11101 instr[21] = 1 if pair
11102 instr[20,16] = Rs
11103 instr[15] = o0 : 1 if ordered
11104 instr[14,10] = Rt2
11105 instr[9,5] = Rn
11106 instr[4.0] = Rt. */
11107
11108 switch (INSTR (22, 21))
11109 {
11110 case 2: ldxr (cpu); return;
11111 case 0: stxr (cpu); return;
11112 default: HALT_NYI;
11113 }
11114 }
11115
11116 static void
11117 dexLoadOther (sim_cpu *cpu)
11118 {
11119 uint32_t dispatch;
11120
11121 /* instr[29,25] = 111_0
11122 instr[24] == 0 ==> dispatch, 1 ==> ldst reg unsigned immediate
11123 instr[21:11,10] is the secondary dispatch. */
11124 if (INSTR (24, 24))
11125 {
11126 dexLoadUnsignedImmediate (cpu);
11127 return;
11128 }
11129
11130 dispatch = ((INSTR (21, 21) << 2) | INSTR (11, 10));
11131 switch (dispatch)
11132 {
11133 case 0: dexLoadUnscaledImmediate (cpu); return;
11134 case 1: dexLoadImmediatePrePost (cpu); return;
11135 case 3: dexLoadImmediatePrePost (cpu); return;
11136 case 6: dexLoadRegisterOffset (cpu); return;
11137
11138 default:
11139 case 2:
11140 case 4:
11141 case 5:
11142 case 7:
11143 HALT_NYI;
11144 }
11145 }
11146
11147 static void
11148 store_pair_u32 (sim_cpu *cpu, int32_t offset, WriteBack wb)
11149 {
11150 unsigned rn = INSTR (14, 10);
11151 unsigned rd = INSTR (9, 5);
11152 unsigned rm = INSTR (4, 0);
11153 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11154
11155 if ((rn == rd || rm == rd) && wb != NoWriteBack)
11156 HALT_UNALLOC; /* ??? */
11157
11158 offset <<= 2;
11159
11160 if (wb != Post)
11161 address += offset;
11162
11163 aarch64_set_mem_u32 (cpu, address,
11164 aarch64_get_reg_u32 (cpu, rm, NO_SP));
11165 aarch64_set_mem_u32 (cpu, address + 4,
11166 aarch64_get_reg_u32 (cpu, rn, NO_SP));
11167
11168 if (wb == Post)
11169 address += offset;
11170
11171 if (wb != NoWriteBack)
11172 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11173 }
11174
11175 static void
11176 store_pair_u64 (sim_cpu *cpu, int32_t offset, WriteBack wb)
11177 {
11178 unsigned rn = INSTR (14, 10);
11179 unsigned rd = INSTR (9, 5);
11180 unsigned rm = INSTR (4, 0);
11181 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11182
11183 if ((rn == rd || rm == rd) && wb != NoWriteBack)
11184 HALT_UNALLOC; /* ??? */
11185
11186 offset <<= 3;
11187
11188 if (wb != Post)
11189 address += offset;
11190
11191 aarch64_set_mem_u64 (cpu, address,
11192 aarch64_get_reg_u64 (cpu, rm, NO_SP));
11193 aarch64_set_mem_u64 (cpu, address + 8,
11194 aarch64_get_reg_u64 (cpu, rn, NO_SP));
11195
11196 if (wb == Post)
11197 address += offset;
11198
11199 if (wb != NoWriteBack)
11200 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11201 }
11202
11203 static void
11204 load_pair_u32 (sim_cpu *cpu, int32_t offset, WriteBack wb)
11205 {
11206 unsigned rn = INSTR (14, 10);
11207 unsigned rd = INSTR (9, 5);
11208 unsigned rm = INSTR (4, 0);
11209 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11210
11211 /* Treat this as unalloc to make sure we don't do it. */
11212 if (rn == rm)
11213 HALT_UNALLOC;
11214
11215 offset <<= 2;
11216
11217 if (wb != Post)
11218 address += offset;
11219
11220 aarch64_set_reg_u64 (cpu, rm, SP_OK, aarch64_get_mem_u32 (cpu, address));
11221 aarch64_set_reg_u64 (cpu, rn, SP_OK, aarch64_get_mem_u32 (cpu, address + 4));
11222
11223 if (wb == Post)
11224 address += offset;
11225
11226 if (wb != NoWriteBack)
11227 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11228 }
11229
11230 static void
11231 load_pair_s32 (sim_cpu *cpu, int32_t offset, WriteBack wb)
11232 {
11233 unsigned rn = INSTR (14, 10);
11234 unsigned rd = INSTR (9, 5);
11235 unsigned rm = INSTR (4, 0);
11236 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11237
11238 /* Treat this as unalloc to make sure we don't do it. */
11239 if (rn == rm)
11240 HALT_UNALLOC;
11241
11242 offset <<= 2;
11243
11244 if (wb != Post)
11245 address += offset;
11246
11247 aarch64_set_reg_s64 (cpu, rm, SP_OK, aarch64_get_mem_s32 (cpu, address));
11248 aarch64_set_reg_s64 (cpu, rn, SP_OK, aarch64_get_mem_s32 (cpu, address + 4));
11249
11250 if (wb == Post)
11251 address += offset;
11252
11253 if (wb != NoWriteBack)
11254 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11255 }
11256
11257 static void
11258 load_pair_u64 (sim_cpu *cpu, int32_t offset, WriteBack wb)
11259 {
11260 unsigned rn = INSTR (14, 10);
11261 unsigned rd = INSTR (9, 5);
11262 unsigned rm = INSTR (4, 0);
11263 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11264
11265 /* Treat this as unalloc to make sure we don't do it. */
11266 if (rn == rm)
11267 HALT_UNALLOC;
11268
11269 offset <<= 3;
11270
11271 if (wb != Post)
11272 address += offset;
11273
11274 aarch64_set_reg_u64 (cpu, rm, SP_OK, aarch64_get_mem_u64 (cpu, address));
11275 aarch64_set_reg_u64 (cpu, rn, SP_OK, aarch64_get_mem_u64 (cpu, address + 8));
11276
11277 if (wb == Post)
11278 address += offset;
11279
11280 if (wb != NoWriteBack)
11281 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11282 }
11283
11284 static void
11285 dex_load_store_pair_gr (sim_cpu *cpu)
11286 {
11287 /* instr[31,30] = size (10=> 64-bit, 01=> signed 32-bit, 00=> 32-bit)
11288 instr[29,25] = instruction encoding: 101_0
11289 instr[26] = V : 1 if fp 0 if gp
11290 instr[24,23] = addressing mode (10=> offset, 01=> post, 11=> pre)
11291 instr[22] = load/store (1=> load)
11292 instr[21,15] = signed, scaled, offset
11293 instr[14,10] = Rn
11294 instr[ 9, 5] = Rd
11295 instr[ 4, 0] = Rm. */
11296
11297 uint32_t dispatch = ((INSTR (31, 30) << 3) | INSTR (24, 22));
11298 int32_t offset = simm32 (aarch64_get_instr (cpu), 21, 15);
11299
11300 switch (dispatch)
11301 {
11302 case 2: store_pair_u32 (cpu, offset, Post); return;
11303 case 3: load_pair_u32 (cpu, offset, Post); return;
11304 case 4: store_pair_u32 (cpu, offset, NoWriteBack); return;
11305 case 5: load_pair_u32 (cpu, offset, NoWriteBack); return;
11306 case 6: store_pair_u32 (cpu, offset, Pre); return;
11307 case 7: load_pair_u32 (cpu, offset, Pre); return;
11308
11309 case 11: load_pair_s32 (cpu, offset, Post); return;
11310 case 13: load_pair_s32 (cpu, offset, NoWriteBack); return;
11311 case 15: load_pair_s32 (cpu, offset, Pre); return;
11312
11313 case 18: store_pair_u64 (cpu, offset, Post); return;
11314 case 19: load_pair_u64 (cpu, offset, Post); return;
11315 case 20: store_pair_u64 (cpu, offset, NoWriteBack); return;
11316 case 21: load_pair_u64 (cpu, offset, NoWriteBack); return;
11317 case 22: store_pair_u64 (cpu, offset, Pre); return;
11318 case 23: load_pair_u64 (cpu, offset, Pre); return;
11319
11320 default:
11321 HALT_UNALLOC;
11322 }
11323 }
11324
11325 static void
11326 store_pair_float (sim_cpu *cpu, int32_t offset, WriteBack wb)
11327 {
11328 unsigned rn = INSTR (14, 10);
11329 unsigned rd = INSTR (9, 5);
11330 unsigned rm = INSTR (4, 0);
11331 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11332
11333 offset <<= 2;
11334
11335 if (wb != Post)
11336 address += offset;
11337
11338 aarch64_set_mem_u32 (cpu, address, aarch64_get_vec_u32 (cpu, rm, 0));
11339 aarch64_set_mem_u32 (cpu, address + 4, aarch64_get_vec_u32 (cpu, rn, 0));
11340
11341 if (wb == Post)
11342 address += offset;
11343
11344 if (wb != NoWriteBack)
11345 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11346 }
11347
11348 static void
11349 store_pair_double (sim_cpu *cpu, int32_t offset, WriteBack wb)
11350 {
11351 unsigned rn = INSTR (14, 10);
11352 unsigned rd = INSTR (9, 5);
11353 unsigned rm = INSTR (4, 0);
11354 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11355
11356 offset <<= 3;
11357
11358 if (wb != Post)
11359 address += offset;
11360
11361 aarch64_set_mem_u64 (cpu, address, aarch64_get_vec_u64 (cpu, rm, 0));
11362 aarch64_set_mem_u64 (cpu, address + 8, aarch64_get_vec_u64 (cpu, rn, 0));
11363
11364 if (wb == Post)
11365 address += offset;
11366
11367 if (wb != NoWriteBack)
11368 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11369 }
11370
11371 static void
11372 store_pair_long_double (sim_cpu *cpu, int32_t offset, WriteBack wb)
11373 {
11374 FRegister a;
11375 unsigned rn = INSTR (14, 10);
11376 unsigned rd = INSTR (9, 5);
11377 unsigned rm = INSTR (4, 0);
11378 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11379
11380 offset <<= 4;
11381
11382 if (wb != Post)
11383 address += offset;
11384
11385 aarch64_get_FP_long_double (cpu, rm, & a);
11386 aarch64_set_mem_long_double (cpu, address, a);
11387 aarch64_get_FP_long_double (cpu, rn, & a);
11388 aarch64_set_mem_long_double (cpu, address + 16, a);
11389
11390 if (wb == Post)
11391 address += offset;
11392
11393 if (wb != NoWriteBack)
11394 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11395 }
11396
11397 static void
11398 load_pair_float (sim_cpu *cpu, int32_t offset, WriteBack wb)
11399 {
11400 unsigned rn = INSTR (14, 10);
11401 unsigned rd = INSTR (9, 5);
11402 unsigned rm = INSTR (4, 0);
11403 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11404
11405 if (rm == rn)
11406 HALT_UNALLOC;
11407
11408 offset <<= 2;
11409
11410 if (wb != Post)
11411 address += offset;
11412
11413 aarch64_set_vec_u32 (cpu, rm, 0, aarch64_get_mem_u32 (cpu, address));
11414 aarch64_set_vec_u32 (cpu, rn, 0, aarch64_get_mem_u32 (cpu, address + 4));
11415
11416 if (wb == Post)
11417 address += offset;
11418
11419 if (wb != NoWriteBack)
11420 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11421 }
11422
11423 static void
11424 load_pair_double (sim_cpu *cpu, int32_t offset, WriteBack wb)
11425 {
11426 unsigned rn = INSTR (14, 10);
11427 unsigned rd = INSTR (9, 5);
11428 unsigned rm = INSTR (4, 0);
11429 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11430
11431 if (rm == rn)
11432 HALT_UNALLOC;
11433
11434 offset <<= 3;
11435
11436 if (wb != Post)
11437 address += offset;
11438
11439 aarch64_set_vec_u64 (cpu, rm, 0, aarch64_get_mem_u64 (cpu, address));
11440 aarch64_set_vec_u64 (cpu, rn, 0, aarch64_get_mem_u64 (cpu, address + 8));
11441
11442 if (wb == Post)
11443 address += offset;
11444
11445 if (wb != NoWriteBack)
11446 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11447 }
11448
11449 static void
11450 load_pair_long_double (sim_cpu *cpu, int32_t offset, WriteBack wb)
11451 {
11452 FRegister a;
11453 unsigned rn = INSTR (14, 10);
11454 unsigned rd = INSTR (9, 5);
11455 unsigned rm = INSTR (4, 0);
11456 uint64_t address = aarch64_get_reg_u64 (cpu, rd, SP_OK);
11457
11458 if (rm == rn)
11459 HALT_UNALLOC;
11460
11461 offset <<= 4;
11462
11463 if (wb != Post)
11464 address += offset;
11465
11466 aarch64_get_mem_long_double (cpu, address, & a);
11467 aarch64_set_FP_long_double (cpu, rm, a);
11468 aarch64_get_mem_long_double (cpu, address + 16, & a);
11469 aarch64_set_FP_long_double (cpu, rn, a);
11470
11471 if (wb == Post)
11472 address += offset;
11473
11474 if (wb != NoWriteBack)
11475 aarch64_set_reg_u64 (cpu, rd, SP_OK, address);
11476 }
11477
11478 static void
11479 dex_load_store_pair_fp (sim_cpu *cpu)
11480 {
11481 /* instr[31,30] = size (10=> 128-bit, 01=> 64-bit, 00=> 32-bit)
11482 instr[29,25] = instruction encoding
11483 instr[24,23] = addressing mode (10=> offset, 01=> post, 11=> pre)
11484 instr[22] = load/store (1=> load)
11485 instr[21,15] = signed, scaled, offset
11486 instr[14,10] = Rn
11487 instr[ 9, 5] = Rd
11488 instr[ 4, 0] = Rm */
11489
11490 uint32_t dispatch = ((INSTR (31, 30) << 3) | INSTR (24, 22));
11491 int32_t offset = simm32 (aarch64_get_instr (cpu), 21, 15);
11492
11493 switch (dispatch)
11494 {
11495 case 2: store_pair_float (cpu, offset, Post); return;
11496 case 3: load_pair_float (cpu, offset, Post); return;
11497 case 4: store_pair_float (cpu, offset, NoWriteBack); return;
11498 case 5: load_pair_float (cpu, offset, NoWriteBack); return;
11499 case 6: store_pair_float (cpu, offset, Pre); return;
11500 case 7: load_pair_float (cpu, offset, Pre); return;
11501
11502 case 10: store_pair_double (cpu, offset, Post); return;
11503 case 11: load_pair_double (cpu, offset, Post); return;
11504 case 12: store_pair_double (cpu, offset, NoWriteBack); return;
11505 case 13: load_pair_double (cpu, offset, NoWriteBack); return;
11506 case 14: store_pair_double (cpu, offset, Pre); return;
11507 case 15: load_pair_double (cpu, offset, Pre); return;
11508
11509 case 18: store_pair_long_double (cpu, offset, Post); return;
11510 case 19: load_pair_long_double (cpu, offset, Post); return;
11511 case 20: store_pair_long_double (cpu, offset, NoWriteBack); return;
11512 case 21: load_pair_long_double (cpu, offset, NoWriteBack); return;
11513 case 22: store_pair_long_double (cpu, offset, Pre); return;
11514 case 23: load_pair_long_double (cpu, offset, Pre); return;
11515
11516 default:
11517 HALT_UNALLOC;
11518 }
11519 }
11520
11521 static inline unsigned
11522 vec_reg (unsigned v, unsigned o)
11523 {
11524 return (v + o) & 0x3F;
11525 }
11526
11527 /* Load multiple N-element structures to M consecutive registers. */
11528 static void
11529 vec_load (sim_cpu *cpu, uint64_t address, unsigned N, unsigned M)
11530 {
11531 int all = INSTR (30, 30);
11532 unsigned size = INSTR (11, 10);
11533 unsigned vd = INSTR (4, 0);
11534 unsigned rpt = (N == M) ? 1 : M;
11535 unsigned selem = N;
11536 unsigned i, j, k;
11537
11538 switch (size)
11539 {
11540 case 0: /* 8-bit operations. */
11541 for (i = 0; i < rpt; i++)
11542 for (j = 0; j < (8 + (8 * all)); j++)
11543 for (k = 0; k < selem; k++)
11544 {
11545 aarch64_set_vec_u8 (cpu, vec_reg (vd, i + k), j,
11546 aarch64_get_mem_u8 (cpu, address));
11547 address += 1;
11548 }
11549 return;
11550
11551 case 1: /* 16-bit operations. */
11552 for (i = 0; i < rpt; i++)
11553 for (j = 0; j < (4 + (4 * all)); j++)
11554 for (k = 0; k < selem; k++)
11555 {
11556 aarch64_set_vec_u16 (cpu, vec_reg (vd, i + k), j,
11557 aarch64_get_mem_u16 (cpu, address));
11558 address += 2;
11559 }
11560 return;
11561
11562 case 2: /* 32-bit operations. */
11563 for (i = 0; i < rpt; i++)
11564 for (j = 0; j < (2 + (2 * all)); j++)
11565 for (k = 0; k < selem; k++)
11566 {
11567 aarch64_set_vec_u32 (cpu, vec_reg (vd, i + k), j,
11568 aarch64_get_mem_u32 (cpu, address));
11569 address += 4;
11570 }
11571 return;
11572
11573 case 3: /* 64-bit operations. */
11574 for (i = 0; i < rpt; i++)
11575 for (j = 0; j < (1 + all); j++)
11576 for (k = 0; k < selem; k++)
11577 {
11578 aarch64_set_vec_u64 (cpu, vec_reg (vd, i + k), j,
11579 aarch64_get_mem_u64 (cpu, address));
11580 address += 8;
11581 }
11582 return;
11583 }
11584 }
11585
11586 /* Load multiple 4-element structures into four consecutive registers. */
11587 static void
11588 LD4 (sim_cpu *cpu, uint64_t address)
11589 {
11590 vec_load (cpu, address, 4, 4);
11591 }
11592
11593 /* Load multiple 3-element structures into three consecutive registers. */
11594 static void
11595 LD3 (sim_cpu *cpu, uint64_t address)
11596 {
11597 vec_load (cpu, address, 3, 3);
11598 }
11599
11600 /* Load multiple 2-element structures into two consecutive registers. */
11601 static void
11602 LD2 (sim_cpu *cpu, uint64_t address)
11603 {
11604 vec_load (cpu, address, 2, 2);
11605 }
11606
11607 /* Load multiple 1-element structures into one register. */
11608 static void
11609 LD1_1 (sim_cpu *cpu, uint64_t address)
11610 {
11611 vec_load (cpu, address, 1, 1);
11612 }
11613
11614 /* Load multiple 1-element structures into two registers. */
11615 static void
11616 LD1_2 (sim_cpu *cpu, uint64_t address)
11617 {
11618 vec_load (cpu, address, 1, 2);
11619 }
11620
11621 /* Load multiple 1-element structures into three registers. */
11622 static void
11623 LD1_3 (sim_cpu *cpu, uint64_t address)
11624 {
11625 vec_load (cpu, address, 1, 3);
11626 }
11627
11628 /* Load multiple 1-element structures into four registers. */
11629 static void
11630 LD1_4 (sim_cpu *cpu, uint64_t address)
11631 {
11632 vec_load (cpu, address, 1, 4);
11633 }
11634
11635 /* Store multiple N-element structures from M consecutive registers. */
11636 static void
11637 vec_store (sim_cpu *cpu, uint64_t address, unsigned N, unsigned M)
11638 {
11639 int all = INSTR (30, 30);
11640 unsigned size = INSTR (11, 10);
11641 unsigned vd = INSTR (4, 0);
11642 unsigned rpt = (N == M) ? 1 : M;
11643 unsigned selem = N;
11644 unsigned i, j, k;
11645
11646 switch (size)
11647 {
11648 case 0: /* 8-bit operations. */
11649 for (i = 0; i < rpt; i++)
11650 for (j = 0; j < (8 + (8 * all)); j++)
11651 for (k = 0; k < selem; k++)
11652 {
11653 aarch64_set_mem_u8
11654 (cpu, address,
11655 aarch64_get_vec_u8 (cpu, vec_reg (vd, i + k), j));
11656 address += 1;
11657 }
11658 return;
11659
11660 case 1: /* 16-bit operations. */
11661 for (i = 0; i < rpt; i++)
11662 for (j = 0; j < (4 + (4 * all)); j++)
11663 for (k = 0; k < selem; k++)
11664 {
11665 aarch64_set_mem_u16
11666 (cpu, address,
11667 aarch64_get_vec_u16 (cpu, vec_reg (vd, i + k), j));
11668 address += 2;
11669 }
11670 return;
11671
11672 case 2: /* 32-bit operations. */
11673 for (i = 0; i < rpt; i++)
11674 for (j = 0; j < (2 + (2 * all)); j++)
11675 for (k = 0; k < selem; k++)
11676 {
11677 aarch64_set_mem_u32
11678 (cpu, address,
11679 aarch64_get_vec_u32 (cpu, vec_reg (vd, i + k), j));
11680 address += 4;
11681 }
11682 return;
11683
11684 case 3: /* 64-bit operations. */
11685 for (i = 0; i < rpt; i++)
11686 for (j = 0; j < (1 + all); j++)
11687 for (k = 0; k < selem; k++)
11688 {
11689 aarch64_set_mem_u64
11690 (cpu, address,
11691 aarch64_get_vec_u64 (cpu, vec_reg (vd, i + k), j));
11692 address += 8;
11693 }
11694 return;
11695 }
11696 }
11697
11698 /* Store multiple 4-element structure from four consecutive registers. */
11699 static void
11700 ST4 (sim_cpu *cpu, uint64_t address)
11701 {
11702 vec_store (cpu, address, 4, 4);
11703 }
11704
11705 /* Store multiple 3-element structures from three consecutive registers. */
11706 static void
11707 ST3 (sim_cpu *cpu, uint64_t address)
11708 {
11709 vec_store (cpu, address, 3, 3);
11710 }
11711
11712 /* Store multiple 2-element structures from two consecutive registers. */
11713 static void
11714 ST2 (sim_cpu *cpu, uint64_t address)
11715 {
11716 vec_store (cpu, address, 2, 2);
11717 }
11718
11719 /* Store multiple 1-element structures from one register. */
11720 static void
11721 ST1_1 (sim_cpu *cpu, uint64_t address)
11722 {
11723 vec_store (cpu, address, 1, 1);
11724 }
11725
11726 /* Store multiple 1-element structures from two registers. */
11727 static void
11728 ST1_2 (sim_cpu *cpu, uint64_t address)
11729 {
11730 vec_store (cpu, address, 1, 2);
11731 }
11732
11733 /* Store multiple 1-element structures from three registers. */
11734 static void
11735 ST1_3 (sim_cpu *cpu, uint64_t address)
11736 {
11737 vec_store (cpu, address, 1, 3);
11738 }
11739
11740 /* Store multiple 1-element structures from four registers. */
11741 static void
11742 ST1_4 (sim_cpu *cpu, uint64_t address)
11743 {
11744 vec_store (cpu, address, 1, 4);
11745 }
11746
11747 #define LDn_STn_SINGLE_LANE_AND_SIZE() \
11748 do \
11749 { \
11750 switch (INSTR (15, 14)) \
11751 { \
11752 case 0: \
11753 lane = (full << 3) | (s << 2) | size; \
11754 size = 0; \
11755 break; \
11756 \
11757 case 1: \
11758 if ((size & 1) == 1) \
11759 HALT_UNALLOC; \
11760 lane = (full << 2) | (s << 1) | (size >> 1); \
11761 size = 1; \
11762 break; \
11763 \
11764 case 2: \
11765 if ((size & 2) == 2) \
11766 HALT_UNALLOC; \
11767 \
11768 if ((size & 1) == 0) \
11769 { \
11770 lane = (full << 1) | s; \
11771 size = 2; \
11772 } \
11773 else \
11774 { \
11775 if (s) \
11776 HALT_UNALLOC; \
11777 lane = full; \
11778 size = 3; \
11779 } \
11780 break; \
11781 \
11782 default: \
11783 HALT_UNALLOC; \
11784 } \
11785 } \
11786 while (0)
11787
11788 /* Load single structure into one lane of N registers. */
11789 static void
11790 do_vec_LDn_single (sim_cpu *cpu, uint64_t address)
11791 {
11792 /* instr[31] = 0
11793 instr[30] = element selector 0=>half, 1=>all elements
11794 instr[29,24] = 00 1101
11795 instr[23] = 0=>simple, 1=>post
11796 instr[22] = 1
11797 instr[21] = width: LD1-or-LD3 (0) / LD2-or-LD4 (1)
11798 instr[20,16] = 0 0000 (simple), Vinc (reg-post-inc, no SP),
11799 11111 (immediate post inc)
11800 instr[15,13] = opcode
11801 instr[12] = S, used for lane number
11802 instr[11,10] = size, also used for lane number
11803 instr[9,5] = address
11804 instr[4,0] = Vd */
11805
11806 unsigned full = INSTR (30, 30);
11807 unsigned vd = INSTR (4, 0);
11808 unsigned size = INSTR (11, 10);
11809 unsigned s = INSTR (12, 12);
11810 int nregs = ((INSTR (13, 13) << 1) | INSTR (21, 21)) + 1;
11811 int lane = 0;
11812 int i;
11813
11814 NYI_assert (29, 24, 0x0D);
11815 NYI_assert (22, 22, 1);
11816
11817 /* Compute the lane number first (using size), and then compute size. */
11818 LDn_STn_SINGLE_LANE_AND_SIZE ();
11819
11820 for (i = 0; i < nregs; i++)
11821 switch (size)
11822 {
11823 case 0:
11824 {
11825 uint8_t val = aarch64_get_mem_u8 (cpu, address + i);
11826 aarch64_set_vec_u8 (cpu, vd + i, lane, val);
11827 break;
11828 }
11829
11830 case 1:
11831 {
11832 uint16_t val = aarch64_get_mem_u16 (cpu, address + (i * 2));
11833 aarch64_set_vec_u16 (cpu, vd + i, lane, val);
11834 break;
11835 }
11836
11837 case 2:
11838 {
11839 uint32_t val = aarch64_get_mem_u32 (cpu, address + (i * 4));
11840 aarch64_set_vec_u32 (cpu, vd + i, lane, val);
11841 break;
11842 }
11843
11844 case 3:
11845 {
11846 uint64_t val = aarch64_get_mem_u64 (cpu, address + (i * 8));
11847 aarch64_set_vec_u64 (cpu, vd + i, lane, val);
11848 break;
11849 }
11850 }
11851 }
11852
11853 /* Store single structure from one lane from N registers. */
11854 static void
11855 do_vec_STn_single (sim_cpu *cpu, uint64_t address)
11856 {
11857 /* instr[31] = 0
11858 instr[30] = element selector 0=>half, 1=>all elements
11859 instr[29,24] = 00 1101
11860 instr[23] = 0=>simple, 1=>post
11861 instr[22] = 0
11862 instr[21] = width: LD1-or-LD3 (0) / LD2-or-LD4 (1)
11863 instr[20,16] = 0 0000 (simple), Vinc (reg-post-inc, no SP),
11864 11111 (immediate post inc)
11865 instr[15,13] = opcode
11866 instr[12] = S, used for lane number
11867 instr[11,10] = size, also used for lane number
11868 instr[9,5] = address
11869 instr[4,0] = Vd */
11870
11871 unsigned full = INSTR (30, 30);
11872 unsigned vd = INSTR (4, 0);
11873 unsigned size = INSTR (11, 10);
11874 unsigned s = INSTR (12, 12);
11875 int nregs = ((INSTR (13, 13) << 1) | INSTR (21, 21)) + 1;
11876 int lane = 0;
11877 int i;
11878
11879 NYI_assert (29, 24, 0x0D);
11880 NYI_assert (22, 22, 0);
11881
11882 /* Compute the lane number first (using size), and then compute size. */
11883 LDn_STn_SINGLE_LANE_AND_SIZE ();
11884
11885 for (i = 0; i < nregs; i++)
11886 switch (size)
11887 {
11888 case 0:
11889 {
11890 uint8_t val = aarch64_get_vec_u8 (cpu, vd + i, lane);
11891 aarch64_set_mem_u8 (cpu, address + i, val);
11892 break;
11893 }
11894
11895 case 1:
11896 {
11897 uint16_t val = aarch64_get_vec_u16 (cpu, vd + i, lane);
11898 aarch64_set_mem_u16 (cpu, address + (i * 2), val);
11899 break;
11900 }
11901
11902 case 2:
11903 {
11904 uint32_t val = aarch64_get_vec_u32 (cpu, vd + i, lane);
11905 aarch64_set_mem_u32 (cpu, address + (i * 4), val);
11906 break;
11907 }
11908
11909 case 3:
11910 {
11911 uint64_t val = aarch64_get_vec_u64 (cpu, vd + i, lane);
11912 aarch64_set_mem_u64 (cpu, address + (i * 8), val);
11913 break;
11914 }
11915 }
11916 }
11917
11918 /* Load single structure into all lanes of N registers. */
11919 static void
11920 do_vec_LDnR (sim_cpu *cpu, uint64_t address)
11921 {
11922 /* instr[31] = 0
11923 instr[30] = element selector 0=>half, 1=>all elements
11924 instr[29,24] = 00 1101
11925 instr[23] = 0=>simple, 1=>post
11926 instr[22] = 1
11927 instr[21] = width: LD1R-or-LD3R (0) / LD2R-or-LD4R (1)
11928 instr[20,16] = 0 0000 (simple), Vinc (reg-post-inc, no SP),
11929 11111 (immediate post inc)
11930 instr[15,14] = 11
11931 instr[13] = width: LD1R-or-LD2R (0) / LD3R-or-LD4R (1)
11932 instr[12] = 0
11933 instr[11,10] = element size 00=> byte(b), 01=> half(h),
11934 10=> word(s), 11=> double(d)
11935 instr[9,5] = address
11936 instr[4,0] = Vd */
11937
11938 unsigned full = INSTR (30, 30);
11939 unsigned vd = INSTR (4, 0);
11940 unsigned size = INSTR (11, 10);
11941 int nregs = ((INSTR (13, 13) << 1) | INSTR (21, 21)) + 1;
11942 int i, n;
11943
11944 NYI_assert (29, 24, 0x0D);
11945 NYI_assert (22, 22, 1);
11946 NYI_assert (15, 14, 3);
11947 NYI_assert (12, 12, 0);
11948
11949 for (n = 0; n < nregs; n++)
11950 switch (size)
11951 {
11952 case 0:
11953 {
11954 uint8_t val = aarch64_get_mem_u8 (cpu, address + n);
11955 for (i = 0; i < (full ? 16 : 8); i++)
11956 aarch64_set_vec_u8 (cpu, vd + n, i, val);
11957 break;
11958 }
11959
11960 case 1:
11961 {
11962 uint16_t val = aarch64_get_mem_u16 (cpu, address + (n * 2));
11963 for (i = 0; i < (full ? 8 : 4); i++)
11964 aarch64_set_vec_u16 (cpu, vd + n, i, val);
11965 break;
11966 }
11967
11968 case 2:
11969 {
11970 uint32_t val = aarch64_get_mem_u32 (cpu, address + (n * 4));
11971 for (i = 0; i < (full ? 4 : 2); i++)
11972 aarch64_set_vec_u32 (cpu, vd + n, i, val);
11973 break;
11974 }
11975
11976 case 3:
11977 {
11978 uint64_t val = aarch64_get_mem_u64 (cpu, address + (n * 8));
11979 for (i = 0; i < (full ? 2 : 1); i++)
11980 aarch64_set_vec_u64 (cpu, vd + n, i, val);
11981 break;
11982 }
11983
11984 default:
11985 HALT_UNALLOC;
11986 }
11987 }
11988
11989 static void
11990 do_vec_load_store (sim_cpu *cpu)
11991 {
11992 /* {LD|ST}<N> {Vd..Vd+N}, vaddr
11993
11994 instr[31] = 0
11995 instr[30] = element selector 0=>half, 1=>all elements
11996 instr[29,25] = 00110
11997 instr[24] = 0=>multiple struct, 1=>single struct
11998 instr[23] = 0=>simple, 1=>post
11999 instr[22] = 0=>store, 1=>load
12000 instr[21] = 0 (LDn) / small(0)-large(1) selector (LDnR)
12001 instr[20,16] = 00000 (simple), Vinc (reg-post-inc, no SP),
12002 11111 (immediate post inc)
12003 instr[15,12] = elements and destinations. eg for load:
12004 0000=>LD4 => load multiple 4-element to
12005 four consecutive registers
12006 0100=>LD3 => load multiple 3-element to
12007 three consecutive registers
12008 1000=>LD2 => load multiple 2-element to
12009 two consecutive registers
12010 0010=>LD1 => load multiple 1-element to
12011 four consecutive registers
12012 0110=>LD1 => load multiple 1-element to
12013 three consecutive registers
12014 1010=>LD1 => load multiple 1-element to
12015 two consecutive registers
12016 0111=>LD1 => load multiple 1-element to
12017 one register
12018 1100=>LDR1,LDR2
12019 1110=>LDR3,LDR4
12020 instr[11,10] = element size 00=> byte(b), 01=> half(h),
12021 10=> word(s), 11=> double(d)
12022 instr[9,5] = Vn, can be SP
12023 instr[4,0] = Vd */
12024
12025 int single;
12026 int post;
12027 int load;
12028 unsigned vn;
12029 uint64_t address;
12030 int type;
12031
12032 if (INSTR (31, 31) != 0 || INSTR (29, 25) != 0x06)
12033 HALT_NYI;
12034
12035 single = INSTR (24, 24);
12036 post = INSTR (23, 23);
12037 load = INSTR (22, 22);
12038 type = INSTR (15, 12);
12039 vn = INSTR (9, 5);
12040 address = aarch64_get_reg_u64 (cpu, vn, SP_OK);
12041
12042 if (! single && INSTR (21, 21) != 0)
12043 HALT_UNALLOC;
12044
12045 if (post)
12046 {
12047 unsigned vm = INSTR (20, 16);
12048
12049 if (vm == R31)
12050 {
12051 unsigned sizeof_operation;
12052
12053 if (single)
12054 {
12055 if ((type >= 0) && (type <= 11))
12056 {
12057 int nregs = ((INSTR (13, 13) << 1) | INSTR (21, 21)) + 1;
12058 switch (INSTR (15, 14))
12059 {
12060 case 0:
12061 sizeof_operation = nregs * 1;
12062 break;
12063 case 1:
12064 sizeof_operation = nregs * 2;
12065 break;
12066 case 2:
12067 if (INSTR (10, 10) == 0)
12068 sizeof_operation = nregs * 4;
12069 else
12070 sizeof_operation = nregs * 8;
12071 break;
12072 default:
12073 HALT_UNALLOC;
12074 }
12075 }
12076 else if (type == 0xC)
12077 {
12078 sizeof_operation = INSTR (21, 21) ? 2 : 1;
12079 sizeof_operation <<= INSTR (11, 10);
12080 }
12081 else if (type == 0xE)
12082 {
12083 sizeof_operation = INSTR (21, 21) ? 4 : 3;
12084 sizeof_operation <<= INSTR (11, 10);
12085 }
12086 else
12087 HALT_UNALLOC;
12088 }
12089 else
12090 {
12091 switch (type)
12092 {
12093 case 0: sizeof_operation = 32; break;
12094 case 4: sizeof_operation = 24; break;
12095 case 8: sizeof_operation = 16; break;
12096
12097 case 7:
12098 /* One register, immediate offset variant. */
12099 sizeof_operation = 8;
12100 break;
12101
12102 case 10:
12103 /* Two registers, immediate offset variant. */
12104 sizeof_operation = 16;
12105 break;
12106
12107 case 6:
12108 /* Three registers, immediate offset variant. */
12109 sizeof_operation = 24;
12110 break;
12111
12112 case 2:
12113 /* Four registers, immediate offset variant. */
12114 sizeof_operation = 32;
12115 break;
12116
12117 default:
12118 HALT_UNALLOC;
12119 }
12120
12121 if (INSTR (30, 30))
12122 sizeof_operation *= 2;
12123 }
12124
12125 aarch64_set_reg_u64 (cpu, vn, SP_OK, address + sizeof_operation);
12126 }
12127 else
12128 aarch64_set_reg_u64 (cpu, vn, SP_OK,
12129 address + aarch64_get_reg_u64 (cpu, vm, NO_SP));
12130 }
12131 else
12132 {
12133 NYI_assert (20, 16, 0);
12134 }
12135
12136 if (single)
12137 {
12138 if (load)
12139 {
12140 if ((type >= 0) && (type <= 11))
12141 do_vec_LDn_single (cpu, address);
12142 else if ((type == 0xC) || (type == 0xE))
12143 do_vec_LDnR (cpu, address);
12144 else
12145 HALT_UNALLOC;
12146 return;
12147 }
12148
12149 /* Stores. */
12150 if ((type >= 0) && (type <= 11))
12151 {
12152 do_vec_STn_single (cpu, address);
12153 return;
12154 }
12155
12156 HALT_UNALLOC;
12157 }
12158
12159 if (load)
12160 {
12161 switch (type)
12162 {
12163 case 0: LD4 (cpu, address); return;
12164 case 4: LD3 (cpu, address); return;
12165 case 8: LD2 (cpu, address); return;
12166 case 2: LD1_4 (cpu, address); return;
12167 case 6: LD1_3 (cpu, address); return;
12168 case 10: LD1_2 (cpu, address); return;
12169 case 7: LD1_1 (cpu, address); return;
12170
12171 default:
12172 HALT_UNALLOC;
12173 }
12174 }
12175
12176 /* Stores. */
12177 switch (type)
12178 {
12179 case 0: ST4 (cpu, address); return;
12180 case 4: ST3 (cpu, address); return;
12181 case 8: ST2 (cpu, address); return;
12182 case 2: ST1_4 (cpu, address); return;
12183 case 6: ST1_3 (cpu, address); return;
12184 case 10: ST1_2 (cpu, address); return;
12185 case 7: ST1_1 (cpu, address); return;
12186 default:
12187 HALT_UNALLOC;
12188 }
12189 }
12190
12191 static void
12192 dexLdSt (sim_cpu *cpu)
12193 {
12194 /* uint32_t group = dispatchGroup (aarch64_get_instr (cpu));
12195 assert group == GROUP_LDST_0100 || group == GROUP_LDST_0110 ||
12196 group == GROUP_LDST_1100 || group == GROUP_LDST_1110
12197 bits [29,28:26] of a LS are the secondary dispatch vector. */
12198 uint32_t group2 = dispatchLS (aarch64_get_instr (cpu));
12199
12200 switch (group2)
12201 {
12202 case LS_EXCL_000:
12203 dexLoadExclusive (cpu); return;
12204
12205 case LS_LIT_010:
12206 case LS_LIT_011:
12207 dexLoadLiteral (cpu); return;
12208
12209 case LS_OTHER_110:
12210 case LS_OTHER_111:
12211 dexLoadOther (cpu); return;
12212
12213 case LS_ADVSIMD_001:
12214 do_vec_load_store (cpu); return;
12215
12216 case LS_PAIR_100:
12217 dex_load_store_pair_gr (cpu); return;
12218
12219 case LS_PAIR_101:
12220 dex_load_store_pair_fp (cpu); return;
12221
12222 default:
12223 /* Should never reach here. */
12224 HALT_NYI;
12225 }
12226 }
12227
12228 /* Specific decode and execute for group Data Processing Register. */
12229
12230 static void
12231 dexLogicalShiftedRegister (sim_cpu *cpu)
12232 {
12233 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
12234 instr[30,29] = op
12235 instr[28:24] = 01010
12236 instr[23,22] = shift : 0 ==> LSL, 1 ==> LSR, 2 ==> ASR, 3 ==> ROR
12237 instr[21] = N
12238 instr[20,16] = Rm
12239 instr[15,10] = count : must be 0xxxxx for 32 bit
12240 instr[9,5] = Rn
12241 instr[4,0] = Rd */
12242
12243 uint32_t size = INSTR (31, 31);
12244 Shift shiftType = INSTR (23, 22);
12245 uint32_t count = INSTR (15, 10);
12246
12247 /* 32 bit operations must have count[5] = 0.
12248 or else we have an UNALLOC. */
12249 if (size == 0 && uimm (count, 5, 5))
12250 HALT_UNALLOC;
12251
12252 /* Dispatch on size:op:N. */
12253 switch ((INSTR (31, 29) << 1) | INSTR (21, 21))
12254 {
12255 case 0: and32_shift (cpu, shiftType, count); return;
12256 case 1: bic32_shift (cpu, shiftType, count); return;
12257 case 2: orr32_shift (cpu, shiftType, count); return;
12258 case 3: orn32_shift (cpu, shiftType, count); return;
12259 case 4: eor32_shift (cpu, shiftType, count); return;
12260 case 5: eon32_shift (cpu, shiftType, count); return;
12261 case 6: ands32_shift (cpu, shiftType, count); return;
12262 case 7: bics32_shift (cpu, shiftType, count); return;
12263 case 8: and64_shift (cpu, shiftType, count); return;
12264 case 9: bic64_shift (cpu, shiftType, count); return;
12265 case 10:orr64_shift (cpu, shiftType, count); return;
12266 case 11:orn64_shift (cpu, shiftType, count); return;
12267 case 12:eor64_shift (cpu, shiftType, count); return;
12268 case 13:eon64_shift (cpu, shiftType, count); return;
12269 case 14:ands64_shift (cpu, shiftType, count); return;
12270 case 15:bics64_shift (cpu, shiftType, count); return;
12271 }
12272 }
12273
12274 /* 32 bit conditional select. */
12275 static void
12276 csel32 (sim_cpu *cpu, CondCode cc)
12277 {
12278 unsigned rm = INSTR (20, 16);
12279 unsigned rn = INSTR (9, 5);
12280 unsigned rd = INSTR (4, 0);
12281
12282 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12283 testConditionCode (cpu, cc)
12284 ? aarch64_get_reg_u32 (cpu, rn, NO_SP)
12285 : aarch64_get_reg_u32 (cpu, rm, NO_SP));
12286 }
12287
12288 /* 64 bit conditional select. */
12289 static void
12290 csel64 (sim_cpu *cpu, CondCode cc)
12291 {
12292 unsigned rm = INSTR (20, 16);
12293 unsigned rn = INSTR (9, 5);
12294 unsigned rd = INSTR (4, 0);
12295
12296 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12297 testConditionCode (cpu, cc)
12298 ? aarch64_get_reg_u64 (cpu, rn, NO_SP)
12299 : aarch64_get_reg_u64 (cpu, rm, NO_SP));
12300 }
12301
12302 /* 32 bit conditional increment. */
12303 static void
12304 csinc32 (sim_cpu *cpu, CondCode cc)
12305 {
12306 unsigned rm = INSTR (20, 16);
12307 unsigned rn = INSTR (9, 5);
12308 unsigned rd = INSTR (4, 0);
12309
12310 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12311 testConditionCode (cpu, cc)
12312 ? aarch64_get_reg_u32 (cpu, rn, NO_SP)
12313 : aarch64_get_reg_u32 (cpu, rm, NO_SP) + 1);
12314 }
12315
12316 /* 64 bit conditional increment. */
12317 static void
12318 csinc64 (sim_cpu *cpu, CondCode cc)
12319 {
12320 unsigned rm = INSTR (20, 16);
12321 unsigned rn = INSTR (9, 5);
12322 unsigned rd = INSTR (4, 0);
12323
12324 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12325 testConditionCode (cpu, cc)
12326 ? aarch64_get_reg_u64 (cpu, rn, NO_SP)
12327 : aarch64_get_reg_u64 (cpu, rm, NO_SP) + 1);
12328 }
12329
12330 /* 32 bit conditional invert. */
12331 static void
12332 csinv32 (sim_cpu *cpu, CondCode cc)
12333 {
12334 unsigned rm = INSTR (20, 16);
12335 unsigned rn = INSTR (9, 5);
12336 unsigned rd = INSTR (4, 0);
12337
12338 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12339 testConditionCode (cpu, cc)
12340 ? aarch64_get_reg_u32 (cpu, rn, NO_SP)
12341 : ~ aarch64_get_reg_u32 (cpu, rm, NO_SP));
12342 }
12343
12344 /* 64 bit conditional invert. */
12345 static void
12346 csinv64 (sim_cpu *cpu, CondCode cc)
12347 {
12348 unsigned rm = INSTR (20, 16);
12349 unsigned rn = INSTR (9, 5);
12350 unsigned rd = INSTR (4, 0);
12351
12352 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12353 testConditionCode (cpu, cc)
12354 ? aarch64_get_reg_u64 (cpu, rn, NO_SP)
12355 : ~ aarch64_get_reg_u64 (cpu, rm, NO_SP));
12356 }
12357
12358 /* 32 bit conditional negate. */
12359 static void
12360 csneg32 (sim_cpu *cpu, CondCode cc)
12361 {
12362 unsigned rm = INSTR (20, 16);
12363 unsigned rn = INSTR (9, 5);
12364 unsigned rd = INSTR (4, 0);
12365
12366 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12367 testConditionCode (cpu, cc)
12368 ? aarch64_get_reg_u32 (cpu, rn, NO_SP)
12369 : - aarch64_get_reg_u32 (cpu, rm, NO_SP));
12370 }
12371
12372 /* 64 bit conditional negate. */
12373 static void
12374 csneg64 (sim_cpu *cpu, CondCode cc)
12375 {
12376 unsigned rm = INSTR (20, 16);
12377 unsigned rn = INSTR (9, 5);
12378 unsigned rd = INSTR (4, 0);
12379
12380 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12381 testConditionCode (cpu, cc)
12382 ? aarch64_get_reg_u64 (cpu, rn, NO_SP)
12383 : - aarch64_get_reg_u64 (cpu, rm, NO_SP));
12384 }
12385
12386 static void
12387 dexCondSelect (sim_cpu *cpu)
12388 {
12389 /* instr[28,21] = 11011011
12390 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
12391 instr[30:11,10] = op : 000 ==> CSEL, 001 ==> CSINC,
12392 100 ==> CSINV, 101 ==> CSNEG,
12393 _1_ ==> UNALLOC
12394 instr[29] = S : 0 ==> ok, 1 ==> UNALLOC
12395 instr[15,12] = cond
12396 instr[29] = S : 0 ==> ok, 1 ==> UNALLOC */
12397
12398 CondCode cc = INSTR (15, 12);
12399 uint32_t S = INSTR (29, 29);
12400 uint32_t op2 = INSTR (11, 10);
12401
12402 if (S == 1)
12403 HALT_UNALLOC;
12404
12405 if (op2 & 0x2)
12406 HALT_UNALLOC;
12407
12408 switch ((INSTR (31, 30) << 1) | op2)
12409 {
12410 case 0: csel32 (cpu, cc); return;
12411 case 1: csinc32 (cpu, cc); return;
12412 case 2: csinv32 (cpu, cc); return;
12413 case 3: csneg32 (cpu, cc); return;
12414 case 4: csel64 (cpu, cc); return;
12415 case 5: csinc64 (cpu, cc); return;
12416 case 6: csinv64 (cpu, cc); return;
12417 case 7: csneg64 (cpu, cc); return;
12418 }
12419 }
12420
12421 /* Some helpers for counting leading 1 or 0 bits. */
12422
12423 /* Counts the number of leading bits which are the same
12424 in a 32 bit value in the range 1 to 32. */
12425 static uint32_t
12426 leading32 (uint32_t value)
12427 {
12428 int32_t mask= 0xffff0000;
12429 uint32_t count= 16; /* Counts number of bits set in mask. */
12430 uint32_t lo = 1; /* Lower bound for number of sign bits. */
12431 uint32_t hi = 32; /* Upper bound for number of sign bits. */
12432
12433 while (lo + 1 < hi)
12434 {
12435 int32_t test = (value & mask);
12436
12437 if (test == 0 || test == mask)
12438 {
12439 lo = count;
12440 count = (lo + hi) / 2;
12441 mask >>= (count - lo);
12442 }
12443 else
12444 {
12445 hi = count;
12446 count = (lo + hi) / 2;
12447 mask <<= hi - count;
12448 }
12449 }
12450
12451 if (lo != hi)
12452 {
12453 int32_t test;
12454
12455 mask >>= 1;
12456 test = (value & mask);
12457
12458 if (test == 0 || test == mask)
12459 count = hi;
12460 else
12461 count = lo;
12462 }
12463
12464 return count;
12465 }
12466
12467 /* Counts the number of leading bits which are the same
12468 in a 64 bit value in the range 1 to 64. */
12469 static uint64_t
12470 leading64 (uint64_t value)
12471 {
12472 int64_t mask= 0xffffffff00000000LL;
12473 uint64_t count = 32; /* Counts number of bits set in mask. */
12474 uint64_t lo = 1; /* Lower bound for number of sign bits. */
12475 uint64_t hi = 64; /* Upper bound for number of sign bits. */
12476
12477 while (lo + 1 < hi)
12478 {
12479 int64_t test = (value & mask);
12480
12481 if (test == 0 || test == mask)
12482 {
12483 lo = count;
12484 count = (lo + hi) / 2;
12485 mask >>= (count - lo);
12486 }
12487 else
12488 {
12489 hi = count;
12490 count = (lo + hi) / 2;
12491 mask <<= hi - count;
12492 }
12493 }
12494
12495 if (lo != hi)
12496 {
12497 int64_t test;
12498
12499 mask >>= 1;
12500 test = (value & mask);
12501
12502 if (test == 0 || test == mask)
12503 count = hi;
12504 else
12505 count = lo;
12506 }
12507
12508 return count;
12509 }
12510
12511 /* Bit operations. */
12512 /* N.B register args may not be SP. */
12513
12514 /* 32 bit count leading sign bits. */
12515 static void
12516 cls32 (sim_cpu *cpu)
12517 {
12518 unsigned rn = INSTR (9, 5);
12519 unsigned rd = INSTR (4, 0);
12520
12521 /* N.B. the result needs to exclude the leading bit. */
12522 aarch64_set_reg_u64
12523 (cpu, rd, NO_SP, leading32 (aarch64_get_reg_u32 (cpu, rn, NO_SP)) - 1);
12524 }
12525
12526 /* 64 bit count leading sign bits. */
12527 static void
12528 cls64 (sim_cpu *cpu)
12529 {
12530 unsigned rn = INSTR (9, 5);
12531 unsigned rd = INSTR (4, 0);
12532
12533 /* N.B. the result needs to exclude the leading bit. */
12534 aarch64_set_reg_u64
12535 (cpu, rd, NO_SP, leading64 (aarch64_get_reg_u64 (cpu, rn, NO_SP)) - 1);
12536 }
12537
12538 /* 32 bit count leading zero bits. */
12539 static void
12540 clz32 (sim_cpu *cpu)
12541 {
12542 unsigned rn = INSTR (9, 5);
12543 unsigned rd = INSTR (4, 0);
12544 uint32_t value = aarch64_get_reg_u32 (cpu, rn, NO_SP);
12545
12546 /* if the sign (top) bit is set then the count is 0. */
12547 if (pick32 (value, 31, 31))
12548 aarch64_set_reg_u64 (cpu, rd, NO_SP, 0L);
12549 else
12550 aarch64_set_reg_u64 (cpu, rd, NO_SP, leading32 (value));
12551 }
12552
12553 /* 64 bit count leading zero bits. */
12554 static void
12555 clz64 (sim_cpu *cpu)
12556 {
12557 unsigned rn = INSTR (9, 5);
12558 unsigned rd = INSTR (4, 0);
12559 uint64_t value = aarch64_get_reg_u64 (cpu, rn, NO_SP);
12560
12561 /* if the sign (top) bit is set then the count is 0. */
12562 if (pick64 (value, 63, 63))
12563 aarch64_set_reg_u64 (cpu, rd, NO_SP, 0L);
12564 else
12565 aarch64_set_reg_u64 (cpu, rd, NO_SP, leading64 (value));
12566 }
12567
12568 /* 32 bit reverse bits. */
12569 static void
12570 rbit32 (sim_cpu *cpu)
12571 {
12572 unsigned rn = INSTR (9, 5);
12573 unsigned rd = INSTR (4, 0);
12574 uint32_t value = aarch64_get_reg_u32 (cpu, rn, NO_SP);
12575 uint32_t result = 0;
12576 int i;
12577
12578 for (i = 0; i < 32; i++)
12579 {
12580 result <<= 1;
12581 result |= (value & 1);
12582 value >>= 1;
12583 }
12584 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
12585 }
12586
12587 /* 64 bit reverse bits. */
12588 static void
12589 rbit64 (sim_cpu *cpu)
12590 {
12591 unsigned rn = INSTR (9, 5);
12592 unsigned rd = INSTR (4, 0);
12593 uint64_t value = aarch64_get_reg_u64 (cpu, rn, NO_SP);
12594 uint64_t result = 0;
12595 int i;
12596
12597 for (i = 0; i < 64; i++)
12598 {
12599 result <<= 1;
12600 result |= (value & 1UL);
12601 value >>= 1;
12602 }
12603 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
12604 }
12605
12606 /* 32 bit reverse bytes. */
12607 static void
12608 rev32 (sim_cpu *cpu)
12609 {
12610 unsigned rn = INSTR (9, 5);
12611 unsigned rd = INSTR (4, 0);
12612 uint32_t value = aarch64_get_reg_u32 (cpu, rn, NO_SP);
12613 uint32_t result = 0;
12614 int i;
12615
12616 for (i = 0; i < 4; i++)
12617 {
12618 result <<= 8;
12619 result |= (value & 0xff);
12620 value >>= 8;
12621 }
12622 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
12623 }
12624
12625 /* 64 bit reverse bytes. */
12626 static void
12627 rev64 (sim_cpu *cpu)
12628 {
12629 unsigned rn = INSTR (9, 5);
12630 unsigned rd = INSTR (4, 0);
12631 uint64_t value = aarch64_get_reg_u64 (cpu, rn, NO_SP);
12632 uint64_t result = 0;
12633 int i;
12634
12635 for (i = 0; i < 8; i++)
12636 {
12637 result <<= 8;
12638 result |= (value & 0xffULL);
12639 value >>= 8;
12640 }
12641 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
12642 }
12643
12644 /* 32 bit reverse shorts. */
12645 /* N.B.this reverses the order of the bytes in each half word. */
12646 static void
12647 revh32 (sim_cpu *cpu)
12648 {
12649 unsigned rn = INSTR (9, 5);
12650 unsigned rd = INSTR (4, 0);
12651 uint32_t value = aarch64_get_reg_u32 (cpu, rn, NO_SP);
12652 uint32_t result = 0;
12653 int i;
12654
12655 for (i = 0; i < 2; i++)
12656 {
12657 result <<= 8;
12658 result |= (value & 0x00ff00ff);
12659 value >>= 8;
12660 }
12661 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
12662 }
12663
12664 /* 64 bit reverse shorts. */
12665 /* N.B.this reverses the order of the bytes in each half word. */
12666 static void
12667 revh64 (sim_cpu *cpu)
12668 {
12669 unsigned rn = INSTR (9, 5);
12670 unsigned rd = INSTR (4, 0);
12671 uint64_t value = aarch64_get_reg_u64 (cpu, rn, NO_SP);
12672 uint64_t result = 0;
12673 int i;
12674
12675 for (i = 0; i < 2; i++)
12676 {
12677 result <<= 8;
12678 result |= (value & 0x00ff00ff00ff00ffULL);
12679 value >>= 8;
12680 }
12681 aarch64_set_reg_u64 (cpu, rd, NO_SP, result);
12682 }
12683
12684 static void
12685 dexDataProc1Source (sim_cpu *cpu)
12686 {
12687 /* instr[30] = 1
12688 instr[28,21] = 111010110
12689 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
12690 instr[29] = S : 0 ==> ok, 1 ==> UNALLOC
12691 instr[20,16] = opcode2 : 00000 ==> ok, ow ==> UNALLOC
12692 instr[15,10] = opcode : 000000 ==> RBIT, 000001 ==> REV16,
12693 000010 ==> REV, 000011 ==> UNALLOC
12694 000100 ==> CLZ, 000101 ==> CLS
12695 ow ==> UNALLOC
12696 instr[9,5] = rn : may not be SP
12697 instr[4,0] = rd : may not be SP. */
12698
12699 uint32_t S = INSTR (29, 29);
12700 uint32_t opcode2 = INSTR (20, 16);
12701 uint32_t opcode = INSTR (15, 10);
12702 uint32_t dispatch = ((INSTR (31, 31) << 3) | opcode);
12703
12704 if (S == 1)
12705 HALT_UNALLOC;
12706
12707 if (opcode2 != 0)
12708 HALT_UNALLOC;
12709
12710 if (opcode & 0x38)
12711 HALT_UNALLOC;
12712
12713 switch (dispatch)
12714 {
12715 case 0: rbit32 (cpu); return;
12716 case 1: revh32 (cpu); return;
12717 case 2: rev32 (cpu); return;
12718 case 4: clz32 (cpu); return;
12719 case 5: cls32 (cpu); return;
12720 case 8: rbit64 (cpu); return;
12721 case 9: revh64 (cpu); return;
12722 case 10:rev32 (cpu); return;
12723 case 11:rev64 (cpu); return;
12724 case 12:clz64 (cpu); return;
12725 case 13:cls64 (cpu); return;
12726 default: HALT_UNALLOC;
12727 }
12728 }
12729
12730 /* Variable shift.
12731 Shifts by count supplied in register.
12732 N.B register args may not be SP.
12733 These all use the shifted auxiliary function for
12734 simplicity and clarity. Writing the actual shift
12735 inline would avoid a branch and so be faster but
12736 would also necessitate getting signs right. */
12737
12738 /* 32 bit arithmetic shift right. */
12739 static void
12740 asrv32 (sim_cpu *cpu)
12741 {
12742 unsigned rm = INSTR (20, 16);
12743 unsigned rn = INSTR (9, 5);
12744 unsigned rd = INSTR (4, 0);
12745
12746 aarch64_set_reg_u64
12747 (cpu, rd, NO_SP,
12748 shifted32 (aarch64_get_reg_u32 (cpu, rn, NO_SP), ASR,
12749 (aarch64_get_reg_u32 (cpu, rm, NO_SP) & 0x1f)));
12750 }
12751
12752 /* 64 bit arithmetic shift right. */
12753 static void
12754 asrv64 (sim_cpu *cpu)
12755 {
12756 unsigned rm = INSTR (20, 16);
12757 unsigned rn = INSTR (9, 5);
12758 unsigned rd = INSTR (4, 0);
12759
12760 aarch64_set_reg_u64
12761 (cpu, rd, NO_SP,
12762 shifted64 (aarch64_get_reg_u64 (cpu, rn, NO_SP), ASR,
12763 (aarch64_get_reg_u64 (cpu, rm, NO_SP) & 0x3f)));
12764 }
12765
12766 /* 32 bit logical shift left. */
12767 static void
12768 lslv32 (sim_cpu *cpu)
12769 {
12770 unsigned rm = INSTR (20, 16);
12771 unsigned rn = INSTR (9, 5);
12772 unsigned rd = INSTR (4, 0);
12773
12774 aarch64_set_reg_u64
12775 (cpu, rd, NO_SP,
12776 shifted32 (aarch64_get_reg_u32 (cpu, rn, NO_SP), LSL,
12777 (aarch64_get_reg_u32 (cpu, rm, NO_SP) & 0x1f)));
12778 }
12779
12780 /* 64 bit arithmetic shift left. */
12781 static void
12782 lslv64 (sim_cpu *cpu)
12783 {
12784 unsigned rm = INSTR (20, 16);
12785 unsigned rn = INSTR (9, 5);
12786 unsigned rd = INSTR (4, 0);
12787
12788 aarch64_set_reg_u64
12789 (cpu, rd, NO_SP,
12790 shifted64 (aarch64_get_reg_u64 (cpu, rn, NO_SP), LSL,
12791 (aarch64_get_reg_u64 (cpu, rm, NO_SP) & 0x3f)));
12792 }
12793
12794 /* 32 bit logical shift right. */
12795 static void
12796 lsrv32 (sim_cpu *cpu)
12797 {
12798 unsigned rm = INSTR (20, 16);
12799 unsigned rn = INSTR (9, 5);
12800 unsigned rd = INSTR (4, 0);
12801
12802 aarch64_set_reg_u64
12803 (cpu, rd, NO_SP,
12804 shifted32 (aarch64_get_reg_u32 (cpu, rn, NO_SP), LSR,
12805 (aarch64_get_reg_u32 (cpu, rm, NO_SP) & 0x1f)));
12806 }
12807
12808 /* 64 bit logical shift right. */
12809 static void
12810 lsrv64 (sim_cpu *cpu)
12811 {
12812 unsigned rm = INSTR (20, 16);
12813 unsigned rn = INSTR (9, 5);
12814 unsigned rd = INSTR (4, 0);
12815
12816 aarch64_set_reg_u64
12817 (cpu, rd, NO_SP,
12818 shifted64 (aarch64_get_reg_u64 (cpu, rn, NO_SP), LSR,
12819 (aarch64_get_reg_u64 (cpu, rm, NO_SP) & 0x3f)));
12820 }
12821
12822 /* 32 bit rotate right. */
12823 static void
12824 rorv32 (sim_cpu *cpu)
12825 {
12826 unsigned rm = INSTR (20, 16);
12827 unsigned rn = INSTR (9, 5);
12828 unsigned rd = INSTR (4, 0);
12829
12830 aarch64_set_reg_u64
12831 (cpu, rd, NO_SP,
12832 shifted32 (aarch64_get_reg_u32 (cpu, rn, NO_SP), ROR,
12833 (aarch64_get_reg_u32 (cpu, rm, NO_SP) & 0x1f)));
12834 }
12835
12836 /* 64 bit rotate right. */
12837 static void
12838 rorv64 (sim_cpu *cpu)
12839 {
12840 unsigned rm = INSTR (20, 16);
12841 unsigned rn = INSTR (9, 5);
12842 unsigned rd = INSTR (4, 0);
12843
12844 aarch64_set_reg_u64
12845 (cpu, rd, NO_SP,
12846 shifted64 (aarch64_get_reg_u64 (cpu, rn, NO_SP), ROR,
12847 (aarch64_get_reg_u64 (cpu, rm, NO_SP) & 0x3f)));
12848 }
12849
12850
12851 /* divide. */
12852
12853 /* 32 bit signed divide. */
12854 static void
12855 cpuiv32 (sim_cpu *cpu)
12856 {
12857 unsigned rm = INSTR (20, 16);
12858 unsigned rn = INSTR (9, 5);
12859 unsigned rd = INSTR (4, 0);
12860 /* N.B. the pseudo-code does the divide using 64 bit data. */
12861 /* TODO : check that this rounds towards zero as required. */
12862 int64_t dividend = aarch64_get_reg_s32 (cpu, rn, NO_SP);
12863 int64_t divisor = aarch64_get_reg_s32 (cpu, rm, NO_SP);
12864
12865 aarch64_set_reg_s64 (cpu, rd, NO_SP,
12866 divisor ? ((int32_t) (dividend / divisor)) : 0);
12867 }
12868
12869 /* 64 bit signed divide. */
12870 static void
12871 cpuiv64 (sim_cpu *cpu)
12872 {
12873 unsigned rm = INSTR (20, 16);
12874 unsigned rn = INSTR (9, 5);
12875 unsigned rd = INSTR (4, 0);
12876
12877 /* TODO : check that this rounds towards zero as required. */
12878 int64_t divisor = aarch64_get_reg_s64 (cpu, rm, NO_SP);
12879
12880 aarch64_set_reg_s64
12881 (cpu, rd, NO_SP,
12882 divisor ? (aarch64_get_reg_s64 (cpu, rn, NO_SP) / divisor) : 0);
12883 }
12884
12885 /* 32 bit unsigned divide. */
12886 static void
12887 udiv32 (sim_cpu *cpu)
12888 {
12889 unsigned rm = INSTR (20, 16);
12890 unsigned rn = INSTR (9, 5);
12891 unsigned rd = INSTR (4, 0);
12892
12893 /* N.B. the pseudo-code does the divide using 64 bit data. */
12894 uint64_t dividend = aarch64_get_reg_u32 (cpu, rn, NO_SP);
12895 uint64_t divisor = aarch64_get_reg_u32 (cpu, rm, NO_SP);
12896
12897 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12898 divisor ? (uint32_t) (dividend / divisor) : 0);
12899 }
12900
12901 /* 64 bit unsigned divide. */
12902 static void
12903 udiv64 (sim_cpu *cpu)
12904 {
12905 unsigned rm = INSTR (20, 16);
12906 unsigned rn = INSTR (9, 5);
12907 unsigned rd = INSTR (4, 0);
12908
12909 /* TODO : check that this rounds towards zero as required. */
12910 uint64_t divisor = aarch64_get_reg_u64 (cpu, rm, NO_SP);
12911
12912 aarch64_set_reg_u64
12913 (cpu, rd, NO_SP,
12914 divisor ? (aarch64_get_reg_u64 (cpu, rn, NO_SP) / divisor) : 0);
12915 }
12916
12917 static void
12918 dexDataProc2Source (sim_cpu *cpu)
12919 {
12920 /* assert instr[30] == 0
12921 instr[28,21] == 11010110
12922 instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit
12923 instr[29] = S : 0 ==> ok, 1 ==> UNALLOC
12924 instr[15,10] = opcode : 000010 ==> UDIV, 000011 ==> CPUIV,
12925 001000 ==> LSLV, 001001 ==> LSRV
12926 001010 ==> ASRV, 001011 ==> RORV
12927 ow ==> UNALLOC. */
12928
12929 uint32_t dispatch;
12930 uint32_t S = INSTR (29, 29);
12931 uint32_t opcode = INSTR (15, 10);
12932
12933 if (S == 1)
12934 HALT_UNALLOC;
12935
12936 if (opcode & 0x34)
12937 HALT_UNALLOC;
12938
12939 dispatch = ( (INSTR (31, 31) << 3)
12940 | (uimm (opcode, 3, 3) << 2)
12941 | uimm (opcode, 1, 0));
12942 switch (dispatch)
12943 {
12944 case 2: udiv32 (cpu); return;
12945 case 3: cpuiv32 (cpu); return;
12946 case 4: lslv32 (cpu); return;
12947 case 5: lsrv32 (cpu); return;
12948 case 6: asrv32 (cpu); return;
12949 case 7: rorv32 (cpu); return;
12950 case 10: udiv64 (cpu); return;
12951 case 11: cpuiv64 (cpu); return;
12952 case 12: lslv64 (cpu); return;
12953 case 13: lsrv64 (cpu); return;
12954 case 14: asrv64 (cpu); return;
12955 case 15: rorv64 (cpu); return;
12956 default: HALT_UNALLOC;
12957 }
12958 }
12959
12960
12961 /* Multiply. */
12962
12963 /* 32 bit multiply and add. */
12964 static void
12965 madd32 (sim_cpu *cpu)
12966 {
12967 unsigned rm = INSTR (20, 16);
12968 unsigned ra = INSTR (14, 10);
12969 unsigned rn = INSTR (9, 5);
12970 unsigned rd = INSTR (4, 0);
12971
12972 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
12973 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12974 aarch64_get_reg_u32 (cpu, ra, NO_SP)
12975 + aarch64_get_reg_u32 (cpu, rn, NO_SP)
12976 * aarch64_get_reg_u32 (cpu, rm, NO_SP));
12977 }
12978
12979 /* 64 bit multiply and add. */
12980 static void
12981 madd64 (sim_cpu *cpu)
12982 {
12983 unsigned rm = INSTR (20, 16);
12984 unsigned ra = INSTR (14, 10);
12985 unsigned rn = INSTR (9, 5);
12986 unsigned rd = INSTR (4, 0);
12987
12988 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
12989 aarch64_set_reg_u64 (cpu, rd, NO_SP,
12990 aarch64_get_reg_u64 (cpu, ra, NO_SP)
12991 + (aarch64_get_reg_u64 (cpu, rn, NO_SP)
12992 * aarch64_get_reg_u64 (cpu, rm, NO_SP)));
12993 }
12994
12995 /* 32 bit multiply and sub. */
12996 static void
12997 msub32 (sim_cpu *cpu)
12998 {
12999 unsigned rm = INSTR (20, 16);
13000 unsigned ra = INSTR (14, 10);
13001 unsigned rn = INSTR (9, 5);
13002 unsigned rd = INSTR (4, 0);
13003
13004 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13005 aarch64_set_reg_u64 (cpu, rd, NO_SP,
13006 aarch64_get_reg_u32 (cpu, ra, NO_SP)
13007 - aarch64_get_reg_u32 (cpu, rn, NO_SP)
13008 * aarch64_get_reg_u32 (cpu, rm, NO_SP));
13009 }
13010
13011 /* 64 bit multiply and sub. */
13012 static void
13013 msub64 (sim_cpu *cpu)
13014 {
13015 unsigned rm = INSTR (20, 16);
13016 unsigned ra = INSTR (14, 10);
13017 unsigned rn = INSTR (9, 5);
13018 unsigned rd = INSTR (4, 0);
13019
13020 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13021 aarch64_set_reg_u64 (cpu, rd, NO_SP,
13022 aarch64_get_reg_u64 (cpu, ra, NO_SP)
13023 - aarch64_get_reg_u64 (cpu, rn, NO_SP)
13024 * aarch64_get_reg_u64 (cpu, rm, NO_SP));
13025 }
13026
13027 /* Signed multiply add long -- source, source2 : 32 bit, source3 : 64 bit. */
13028 static void
13029 smaddl (sim_cpu *cpu)
13030 {
13031 unsigned rm = INSTR (20, 16);
13032 unsigned ra = INSTR (14, 10);
13033 unsigned rn = INSTR (9, 5);
13034 unsigned rd = INSTR (4, 0);
13035
13036 /* N.B. we need to multiply the signed 32 bit values in rn, rm to
13037 obtain a 64 bit product. */
13038 aarch64_set_reg_s64
13039 (cpu, rd, NO_SP,
13040 aarch64_get_reg_s64 (cpu, ra, NO_SP)
13041 + ((int64_t) aarch64_get_reg_s32 (cpu, rn, NO_SP))
13042 * ((int64_t) aarch64_get_reg_s32 (cpu, rm, NO_SP)));
13043 }
13044
13045 /* Signed multiply sub long -- source, source2 : 32 bit, source3 : 64 bit. */
13046 static void
13047 smsubl (sim_cpu *cpu)
13048 {
13049 unsigned rm = INSTR (20, 16);
13050 unsigned ra = INSTR (14, 10);
13051 unsigned rn = INSTR (9, 5);
13052 unsigned rd = INSTR (4, 0);
13053
13054 /* N.B. we need to multiply the signed 32 bit values in rn, rm to
13055 obtain a 64 bit product. */
13056 aarch64_set_reg_s64
13057 (cpu, rd, NO_SP,
13058 aarch64_get_reg_s64 (cpu, ra, NO_SP)
13059 - ((int64_t) aarch64_get_reg_s32 (cpu, rn, NO_SP))
13060 * ((int64_t) aarch64_get_reg_s32 (cpu, rm, NO_SP)));
13061 }
13062
13063 /* Integer Multiply/Divide. */
13064
13065 /* First some macros and a helper function. */
13066 /* Macros to test or access elements of 64 bit words. */
13067
13068 /* Mask used to access lo 32 bits of 64 bit unsigned int. */
13069 #define LOW_WORD_MASK ((1ULL << 32) - 1)
13070 /* Return the lo 32 bit word of a 64 bit unsigned int as a 64 bit unsigned int. */
13071 #define lowWordToU64(_value_u64) ((_value_u64) & LOW_WORD_MASK)
13072 /* Return the hi 32 bit word of a 64 bit unsigned int as a 64 bit unsigned int. */
13073 #define highWordToU64(_value_u64) ((_value_u64) >> 32)
13074
13075 /* Offset of sign bit in 64 bit signed integger. */
13076 #define SIGN_SHIFT_U64 63
13077 /* The sign bit itself -- also identifies the minimum negative int value. */
13078 #define SIGN_BIT_U64 (1UL << SIGN_SHIFT_U64)
13079 /* Return true if a 64 bit signed int presented as an unsigned int is the
13080 most negative value. */
13081 #define isMinimumU64(_value_u64) ((_value_u64) == SIGN_BIT_U64)
13082 /* Return true (non-zero) if a 64 bit signed int presented as an unsigned
13083 int has its sign bit set to false. */
13084 #define isSignSetU64(_value_u64) ((_value_u64) & SIGN_BIT_U64)
13085 /* Return 1L or -1L according to whether a 64 bit signed int presented as
13086 an unsigned int has its sign bit set or not. */
13087 #define signOfU64(_value_u64) (1L + (((value_u64) >> SIGN_SHIFT_U64) * -2L)
13088 /* Clear the sign bit of a 64 bit signed int presented as an unsigned int. */
13089 #define clearSignU64(_value_u64) ((_value_u64) &= ~SIGN_BIT_U64)
13090
13091 /* Multiply two 64 bit ints and return.
13092 the hi 64 bits of the 128 bit product. */
13093
13094 static uint64_t
13095 mul64hi (uint64_t value1, uint64_t value2)
13096 {
13097 uint64_t resultmid1;
13098 uint64_t result;
13099 uint64_t value1_lo = lowWordToU64 (value1);
13100 uint64_t value1_hi = highWordToU64 (value1) ;
13101 uint64_t value2_lo = lowWordToU64 (value2);
13102 uint64_t value2_hi = highWordToU64 (value2);
13103
13104 /* Cross-multiply and collect results. */
13105 uint64_t xproductlo = value1_lo * value2_lo;
13106 uint64_t xproductmid1 = value1_lo * value2_hi;
13107 uint64_t xproductmid2 = value1_hi * value2_lo;
13108 uint64_t xproducthi = value1_hi * value2_hi;
13109 uint64_t carry = 0;
13110 /* Start accumulating 64 bit results. */
13111 /* Drop bottom half of lowest cross-product. */
13112 uint64_t resultmid = xproductlo >> 32;
13113 /* Add in middle products. */
13114 resultmid = resultmid + xproductmid1;
13115
13116 /* Check for overflow. */
13117 if (resultmid < xproductmid1)
13118 /* Carry over 1 into top cross-product. */
13119 carry++;
13120
13121 resultmid1 = resultmid + xproductmid2;
13122
13123 /* Check for overflow. */
13124 if (resultmid1 < xproductmid2)
13125 /* Carry over 1 into top cross-product. */
13126 carry++;
13127
13128 /* Drop lowest 32 bits of middle cross-product. */
13129 result = resultmid1 >> 32;
13130 /* Move carry bit to just above middle cross-product highest bit. */
13131 carry = carry << 32;
13132
13133 /* Add top cross-product plus and any carry. */
13134 result += xproducthi + carry;
13135
13136 return result;
13137 }
13138
13139 /* Signed multiply high, source, source2 :
13140 64 bit, dest <-- high 64-bit of result. */
13141 static void
13142 smulh (sim_cpu *cpu)
13143 {
13144 uint64_t uresult;
13145 int64_t result;
13146 unsigned rm = INSTR (20, 16);
13147 unsigned rn = INSTR (9, 5);
13148 unsigned rd = INSTR (4, 0);
13149 GReg ra = INSTR (14, 10);
13150 int64_t value1 = aarch64_get_reg_u64 (cpu, rn, NO_SP);
13151 int64_t value2 = aarch64_get_reg_u64 (cpu, rm, NO_SP);
13152 uint64_t uvalue1;
13153 uint64_t uvalue2;
13154 int negate = 0;
13155
13156 if (ra != R31)
13157 HALT_UNALLOC;
13158
13159 /* Convert to unsigned and use the unsigned mul64hi routine
13160 the fix the sign up afterwards. */
13161 if (value1 < 0)
13162 {
13163 negate = !negate;
13164 uvalue1 = -value1;
13165 }
13166 else
13167 {
13168 uvalue1 = value1;
13169 }
13170
13171 if (value2 < 0)
13172 {
13173 negate = !negate;
13174 uvalue2 = -value2;
13175 }
13176 else
13177 {
13178 uvalue2 = value2;
13179 }
13180
13181 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13182
13183 uresult = mul64hi (uvalue1, uvalue2);
13184 result = uresult;
13185
13186 if (negate)
13187 {
13188 /* Multiply 128-bit result by -1, which means highpart gets inverted,
13189 and has carry in added only if low part is 0. */
13190 result = ~result;
13191 if ((uvalue1 * uvalue2) == 0)
13192 result += 1;
13193 }
13194
13195 aarch64_set_reg_s64 (cpu, rd, NO_SP, result);
13196 }
13197
13198 /* Unsigned multiply add long -- source, source2 :
13199 32 bit, source3 : 64 bit. */
13200 static void
13201 umaddl (sim_cpu *cpu)
13202 {
13203 unsigned rm = INSTR (20, 16);
13204 unsigned ra = INSTR (14, 10);
13205 unsigned rn = INSTR (9, 5);
13206 unsigned rd = INSTR (4, 0);
13207
13208 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13209 /* N.B. we need to multiply the signed 32 bit values in rn, rm to
13210 obtain a 64 bit product. */
13211 aarch64_set_reg_u64
13212 (cpu, rd, NO_SP,
13213 aarch64_get_reg_u64 (cpu, ra, NO_SP)
13214 + ((uint64_t) aarch64_get_reg_u32 (cpu, rn, NO_SP))
13215 * ((uint64_t) aarch64_get_reg_u32 (cpu, rm, NO_SP)));
13216 }
13217
13218 /* Unsigned multiply sub long -- source, source2 : 32 bit, source3 : 64 bit. */
13219 static void
13220 umsubl (sim_cpu *cpu)
13221 {
13222 unsigned rm = INSTR (20, 16);
13223 unsigned ra = INSTR (14, 10);
13224 unsigned rn = INSTR (9, 5);
13225 unsigned rd = INSTR (4, 0);
13226
13227 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13228 /* N.B. we need to multiply the signed 32 bit values in rn, rm to
13229 obtain a 64 bit product. */
13230 aarch64_set_reg_u64
13231 (cpu, rd, NO_SP,
13232 aarch64_get_reg_u64 (cpu, ra, NO_SP)
13233 - ((uint64_t) aarch64_get_reg_u32 (cpu, rn, NO_SP))
13234 * ((uint64_t) aarch64_get_reg_u32 (cpu, rm, NO_SP)));
13235 }
13236
13237 /* Unsigned multiply high, source, source2 :
13238 64 bit, dest <-- high 64-bit of result. */
13239 static void
13240 umulh (sim_cpu *cpu)
13241 {
13242 unsigned rm = INSTR (20, 16);
13243 unsigned rn = INSTR (9, 5);
13244 unsigned rd = INSTR (4, 0);
13245 GReg ra = INSTR (14, 10);
13246
13247 if (ra != R31)
13248 HALT_UNALLOC;
13249
13250 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13251 aarch64_set_reg_u64 (cpu, rd, NO_SP,
13252 mul64hi (aarch64_get_reg_u64 (cpu, rn, NO_SP),
13253 aarch64_get_reg_u64 (cpu, rm, NO_SP)));
13254 }
13255
13256 static void
13257 dexDataProc3Source (sim_cpu *cpu)
13258 {
13259 /* assert instr[28,24] == 11011. */
13260 /* instr[31] = size : 0 ==> 32 bit, 1 ==> 64 bit (for rd at least)
13261 instr[30,29] = op54 : 00 ==> ok, ow ==> UNALLOC
13262 instr[23,21] = op31 : 111 ==> UNALLOC, o2 ==> ok
13263 instr[15] = o0 : 0/1 ==> ok
13264 instr[23,21:15] ==> op : 0000 ==> MADD, 0001 ==> MSUB, (32/64 bit)
13265 0010 ==> SMADDL, 0011 ==> SMSUBL, (64 bit only)
13266 0100 ==> SMULH, (64 bit only)
13267 1010 ==> UMADDL, 1011 ==> UNSUBL, (64 bit only)
13268 1100 ==> UMULH (64 bit only)
13269 ow ==> UNALLOC. */
13270
13271 uint32_t dispatch;
13272 uint32_t size = INSTR (31, 31);
13273 uint32_t op54 = INSTR (30, 29);
13274 uint32_t op31 = INSTR (23, 21);
13275 uint32_t o0 = INSTR (15, 15);
13276
13277 if (op54 != 0)
13278 HALT_UNALLOC;
13279
13280 if (size == 0)
13281 {
13282 if (op31 != 0)
13283 HALT_UNALLOC;
13284
13285 if (o0 == 0)
13286 madd32 (cpu);
13287 else
13288 msub32 (cpu);
13289 return;
13290 }
13291
13292 dispatch = (op31 << 1) | o0;
13293
13294 switch (dispatch)
13295 {
13296 case 0: madd64 (cpu); return;
13297 case 1: msub64 (cpu); return;
13298 case 2: smaddl (cpu); return;
13299 case 3: smsubl (cpu); return;
13300 case 4: smulh (cpu); return;
13301 case 10: umaddl (cpu); return;
13302 case 11: umsubl (cpu); return;
13303 case 12: umulh (cpu); return;
13304 default: HALT_UNALLOC;
13305 }
13306 }
13307
13308 static void
13309 dexDPReg (sim_cpu *cpu)
13310 {
13311 /* uint32_t group = dispatchGroup (aarch64_get_instr (cpu));
13312 assert group == GROUP_DPREG_0101 || group == GROUP_DPREG_1101
13313 bits [28:24:21] of a DPReg are the secondary dispatch vector. */
13314 uint32_t group2 = dispatchDPReg (aarch64_get_instr (cpu));
13315
13316 switch (group2)
13317 {
13318 case DPREG_LOG_000:
13319 case DPREG_LOG_001:
13320 dexLogicalShiftedRegister (cpu); return;
13321
13322 case DPREG_ADDSHF_010:
13323 dexAddSubtractShiftedRegister (cpu); return;
13324
13325 case DPREG_ADDEXT_011:
13326 dexAddSubtractExtendedRegister (cpu); return;
13327
13328 case DPREG_ADDCOND_100:
13329 {
13330 /* This set bundles a variety of different operations. */
13331 /* Check for. */
13332 /* 1) add/sub w carry. */
13333 uint32_t mask1 = 0x1FE00000U;
13334 uint32_t val1 = 0x1A000000U;
13335 /* 2) cond compare register/immediate. */
13336 uint32_t mask2 = 0x1FE00000U;
13337 uint32_t val2 = 0x1A400000U;
13338 /* 3) cond select. */
13339 uint32_t mask3 = 0x1FE00000U;
13340 uint32_t val3 = 0x1A800000U;
13341 /* 4) data proc 1/2 source. */
13342 uint32_t mask4 = 0x1FE00000U;
13343 uint32_t val4 = 0x1AC00000U;
13344
13345 if ((aarch64_get_instr (cpu) & mask1) == val1)
13346 dexAddSubtractWithCarry (cpu);
13347
13348 else if ((aarch64_get_instr (cpu) & mask2) == val2)
13349 CondCompare (cpu);
13350
13351 else if ((aarch64_get_instr (cpu) & mask3) == val3)
13352 dexCondSelect (cpu);
13353
13354 else if ((aarch64_get_instr (cpu) & mask4) == val4)
13355 {
13356 /* Bit 30 is clear for data proc 2 source
13357 and set for data proc 1 source. */
13358 if (aarch64_get_instr (cpu) & (1U << 30))
13359 dexDataProc1Source (cpu);
13360 else
13361 dexDataProc2Source (cpu);
13362 }
13363
13364 else
13365 /* Should not reach here. */
13366 HALT_NYI;
13367
13368 return;
13369 }
13370
13371 case DPREG_3SRC_110:
13372 dexDataProc3Source (cpu); return;
13373
13374 case DPREG_UNALLOC_101:
13375 HALT_UNALLOC;
13376
13377 case DPREG_3SRC_111:
13378 dexDataProc3Source (cpu); return;
13379
13380 default:
13381 /* Should never reach here. */
13382 HALT_NYI;
13383 }
13384 }
13385
13386 /* Unconditional Branch immediate.
13387 Offset is a PC-relative byte offset in the range +/- 128MiB.
13388 The offset is assumed to be raw from the decode i.e. the
13389 simulator is expected to scale them from word offsets to byte. */
13390
13391 /* Unconditional branch. */
13392 static void
13393 buc (sim_cpu *cpu, int32_t offset)
13394 {
13395 aarch64_set_next_PC_by_offset (cpu, offset);
13396 }
13397
13398 static unsigned stack_depth = 0;
13399
13400 /* Unconditional branch and link -- writes return PC to LR. */
13401 static void
13402 bl (sim_cpu *cpu, int32_t offset)
13403 {
13404 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13405 aarch64_save_LR (cpu);
13406 aarch64_set_next_PC_by_offset (cpu, offset);
13407
13408 if (TRACE_BRANCH_P (cpu))
13409 {
13410 ++ stack_depth;
13411 TRACE_BRANCH (cpu,
13412 " %*scall %" PRIx64 " [%s]"
13413 " [args: %" PRIx64 " %" PRIx64 " %" PRIx64 "]",
13414 stack_depth, " ", aarch64_get_next_PC (cpu),
13415 aarch64_get_func (CPU_STATE (cpu),
13416 aarch64_get_next_PC (cpu)),
13417 aarch64_get_reg_u64 (cpu, 0, NO_SP),
13418 aarch64_get_reg_u64 (cpu, 1, NO_SP),
13419 aarch64_get_reg_u64 (cpu, 2, NO_SP)
13420 );
13421 }
13422 }
13423
13424 /* Unconditional Branch register.
13425 Branch/return address is in source register. */
13426
13427 /* Unconditional branch. */
13428 static void
13429 br (sim_cpu *cpu)
13430 {
13431 unsigned rn = INSTR (9, 5);
13432 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13433 aarch64_set_next_PC (cpu, aarch64_get_reg_u64 (cpu, rn, NO_SP));
13434 }
13435
13436 /* Unconditional branch and link -- writes return PC to LR. */
13437 static void
13438 blr (sim_cpu *cpu)
13439 {
13440 unsigned rn = INSTR (9, 5);
13441
13442 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13443 /* The pseudo code in the spec says we update LR before fetching.
13444 the value from the rn. */
13445 aarch64_save_LR (cpu);
13446 aarch64_set_next_PC (cpu, aarch64_get_reg_u64 (cpu, rn, NO_SP));
13447
13448 if (TRACE_BRANCH_P (cpu))
13449 {
13450 ++ stack_depth;
13451 TRACE_BRANCH (cpu,
13452 " %*scall %" PRIx64 " [%s]"
13453 " [args: %" PRIx64 " %" PRIx64 " %" PRIx64 "]",
13454 stack_depth, " ", aarch64_get_next_PC (cpu),
13455 aarch64_get_func (CPU_STATE (cpu),
13456 aarch64_get_next_PC (cpu)),
13457 aarch64_get_reg_u64 (cpu, 0, NO_SP),
13458 aarch64_get_reg_u64 (cpu, 1, NO_SP),
13459 aarch64_get_reg_u64 (cpu, 2, NO_SP)
13460 );
13461 }
13462 }
13463
13464 /* Return -- assembler will default source to LR this is functionally
13465 equivalent to br but, presumably, unlike br it side effects the
13466 branch predictor. */
13467 static void
13468 ret (sim_cpu *cpu)
13469 {
13470 unsigned rn = INSTR (9, 5);
13471 aarch64_set_next_PC (cpu, aarch64_get_reg_u64 (cpu, rn, NO_SP));
13472
13473 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13474 if (TRACE_BRANCH_P (cpu))
13475 {
13476 TRACE_BRANCH (cpu,
13477 " %*sreturn [result: %" PRIx64 "]",
13478 stack_depth, " ", aarch64_get_reg_u64 (cpu, 0, NO_SP));
13479 -- stack_depth;
13480 }
13481 }
13482
13483 /* NOP -- we implement this and call it from the decode in case we
13484 want to intercept it later. */
13485
13486 static void
13487 nop (sim_cpu *cpu)
13488 {
13489 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13490 }
13491
13492 /* Data synchronization barrier. */
13493
13494 static void
13495 dsb (sim_cpu *cpu)
13496 {
13497 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13498 }
13499
13500 /* Data memory barrier. */
13501
13502 static void
13503 dmb (sim_cpu *cpu)
13504 {
13505 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13506 }
13507
13508 /* Instruction synchronization barrier. */
13509
13510 static void
13511 isb (sim_cpu *cpu)
13512 {
13513 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13514 }
13515
13516 static void
13517 dexBranchImmediate (sim_cpu *cpu)
13518 {
13519 /* assert instr[30,26] == 00101
13520 instr[31] ==> 0 == B, 1 == BL
13521 instr[25,0] == imm26 branch offset counted in words. */
13522
13523 uint32_t top = INSTR (31, 31);
13524 /* We have a 26 byte signed word offset which we need to pass to the
13525 execute routine as a signed byte offset. */
13526 int32_t offset = simm32 (aarch64_get_instr (cpu), 25, 0) << 2;
13527
13528 if (top)
13529 bl (cpu, offset);
13530 else
13531 buc (cpu, offset);
13532 }
13533
13534 /* Control Flow. */
13535
13536 /* Conditional branch
13537
13538 Offset is a PC-relative byte offset in the range +/- 1MiB pos is
13539 a bit position in the range 0 .. 63
13540
13541 cc is a CondCode enum value as pulled out of the decode
13542
13543 N.B. any offset register (source) can only be Xn or Wn. */
13544
13545 static void
13546 bcc (sim_cpu *cpu, int32_t offset, CondCode cc)
13547 {
13548 /* The test returns TRUE if CC is met. */
13549 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13550 if (testConditionCode (cpu, cc))
13551 aarch64_set_next_PC_by_offset (cpu, offset);
13552 }
13553
13554 /* 32 bit branch on register non-zero. */
13555 static void
13556 cbnz32 (sim_cpu *cpu, int32_t offset)
13557 {
13558 unsigned rt = INSTR (4, 0);
13559
13560 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13561 if (aarch64_get_reg_u32 (cpu, rt, NO_SP) != 0)
13562 aarch64_set_next_PC_by_offset (cpu, offset);
13563 }
13564
13565 /* 64 bit branch on register zero. */
13566 static void
13567 cbnz (sim_cpu *cpu, int32_t offset)
13568 {
13569 unsigned rt = INSTR (4, 0);
13570
13571 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13572 if (aarch64_get_reg_u64 (cpu, rt, NO_SP) != 0)
13573 aarch64_set_next_PC_by_offset (cpu, offset);
13574 }
13575
13576 /* 32 bit branch on register non-zero. */
13577 static void
13578 cbz32 (sim_cpu *cpu, int32_t offset)
13579 {
13580 unsigned rt = INSTR (4, 0);
13581
13582 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13583 if (aarch64_get_reg_u32 (cpu, rt, NO_SP) == 0)
13584 aarch64_set_next_PC_by_offset (cpu, offset);
13585 }
13586
13587 /* 64 bit branch on register zero. */
13588 static void
13589 cbz (sim_cpu *cpu, int32_t offset)
13590 {
13591 unsigned rt = INSTR (4, 0);
13592
13593 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13594 if (aarch64_get_reg_u64 (cpu, rt, NO_SP) == 0)
13595 aarch64_set_next_PC_by_offset (cpu, offset);
13596 }
13597
13598 /* Branch on register bit test non-zero -- one size fits all. */
13599 static void
13600 tbnz (sim_cpu *cpu, uint32_t pos, int32_t offset)
13601 {
13602 unsigned rt = INSTR (4, 0);
13603
13604 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13605 if (aarch64_get_reg_u64 (cpu, rt, NO_SP) & (((uint64_t) 1) << pos))
13606 aarch64_set_next_PC_by_offset (cpu, offset);
13607 }
13608
13609 /* Branch on register bit test zero -- one size fits all. */
13610 static void
13611 tbz (sim_cpu *cpu, uint32_t pos, int32_t offset)
13612 {
13613 unsigned rt = INSTR (4, 0);
13614
13615 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13616 if (!(aarch64_get_reg_u64 (cpu, rt, NO_SP) & (((uint64_t) 1) << pos)))
13617 aarch64_set_next_PC_by_offset (cpu, offset);
13618 }
13619
13620 static void
13621 dexCompareBranchImmediate (sim_cpu *cpu)
13622 {
13623 /* instr[30,25] = 01 1010
13624 instr[31] = size : 0 ==> 32, 1 ==> 64
13625 instr[24] = op : 0 ==> CBZ, 1 ==> CBNZ
13626 instr[23,5] = simm19 branch offset counted in words
13627 instr[4,0] = rt */
13628
13629 uint32_t size = INSTR (31, 31);
13630 uint32_t op = INSTR (24, 24);
13631 int32_t offset = simm32 (aarch64_get_instr (cpu), 23, 5) << 2;
13632
13633 if (size == 0)
13634 {
13635 if (op == 0)
13636 cbz32 (cpu, offset);
13637 else
13638 cbnz32 (cpu, offset);
13639 }
13640 else
13641 {
13642 if (op == 0)
13643 cbz (cpu, offset);
13644 else
13645 cbnz (cpu, offset);
13646 }
13647 }
13648
13649 static void
13650 dexTestBranchImmediate (sim_cpu *cpu)
13651 {
13652 /* instr[31] = b5 : bit 5 of test bit idx
13653 instr[30,25] = 01 1011
13654 instr[24] = op : 0 ==> TBZ, 1 == TBNZ
13655 instr[23,19] = b40 : bits 4 to 0 of test bit idx
13656 instr[18,5] = simm14 : signed offset counted in words
13657 instr[4,0] = uimm5 */
13658
13659 uint32_t pos = ((INSTR (31, 31) << 5) | INSTR (23, 19));
13660 int32_t offset = simm32 (aarch64_get_instr (cpu), 18, 5) << 2;
13661
13662 NYI_assert (30, 25, 0x1b);
13663
13664 if (INSTR (24, 24) == 0)
13665 tbz (cpu, pos, offset);
13666 else
13667 tbnz (cpu, pos, offset);
13668 }
13669
13670 static void
13671 dexCondBranchImmediate (sim_cpu *cpu)
13672 {
13673 /* instr[31,25] = 010 1010
13674 instr[24] = op1; op => 00 ==> B.cond
13675 instr[23,5] = simm19 : signed offset counted in words
13676 instr[4] = op0
13677 instr[3,0] = cond */
13678
13679 int32_t offset;
13680 uint32_t op = ((INSTR (24, 24) << 1) | INSTR (4, 4));
13681
13682 NYI_assert (31, 25, 0x2a);
13683
13684 if (op != 0)
13685 HALT_UNALLOC;
13686
13687 offset = simm32 (aarch64_get_instr (cpu), 23, 5) << 2;
13688
13689 bcc (cpu, offset, INSTR (3, 0));
13690 }
13691
13692 static void
13693 dexBranchRegister (sim_cpu *cpu)
13694 {
13695 /* instr[31,25] = 110 1011
13696 instr[24,21] = op : 0 ==> BR, 1 => BLR, 2 => RET, 3 => ERET, 4 => DRPS
13697 instr[20,16] = op2 : must be 11111
13698 instr[15,10] = op3 : must be 000000
13699 instr[4,0] = op2 : must be 11111. */
13700
13701 uint32_t op = INSTR (24, 21);
13702 uint32_t op2 = INSTR (20, 16);
13703 uint32_t op3 = INSTR (15, 10);
13704 uint32_t op4 = INSTR (4, 0);
13705
13706 NYI_assert (31, 25, 0x6b);
13707
13708 if (op2 != 0x1F || op3 != 0 || op4 != 0)
13709 HALT_UNALLOC;
13710
13711 if (op == 0)
13712 br (cpu);
13713
13714 else if (op == 1)
13715 blr (cpu);
13716
13717 else if (op == 2)
13718 ret (cpu);
13719
13720 else
13721 {
13722 /* ERET and DRPS accept 0b11111 for rn = instr [4,0]. */
13723 /* anything else is unallocated. */
13724 uint32_t rn = INSTR (4, 0);
13725
13726 if (rn != 0x1f)
13727 HALT_UNALLOC;
13728
13729 if (op == 4 || op == 5)
13730 HALT_NYI;
13731
13732 HALT_UNALLOC;
13733 }
13734 }
13735
13736 /* FIXME: We should get the Angel SWI values from ../../libgloss/aarch64/svc.h
13737 but this may not be available. So instead we define the values we need
13738 here. */
13739 #define AngelSVC_Reason_Open 0x01
13740 #define AngelSVC_Reason_Close 0x02
13741 #define AngelSVC_Reason_Write 0x05
13742 #define AngelSVC_Reason_Read 0x06
13743 #define AngelSVC_Reason_IsTTY 0x09
13744 #define AngelSVC_Reason_Seek 0x0A
13745 #define AngelSVC_Reason_FLen 0x0C
13746 #define AngelSVC_Reason_Remove 0x0E
13747 #define AngelSVC_Reason_Rename 0x0F
13748 #define AngelSVC_Reason_Clock 0x10
13749 #define AngelSVC_Reason_Time 0x11
13750 #define AngelSVC_Reason_System 0x12
13751 #define AngelSVC_Reason_Errno 0x13
13752 #define AngelSVC_Reason_GetCmdLine 0x15
13753 #define AngelSVC_Reason_HeapInfo 0x16
13754 #define AngelSVC_Reason_ReportException 0x18
13755 #define AngelSVC_Reason_Elapsed 0x30
13756
13757
13758 static void
13759 handle_halt (sim_cpu *cpu, uint32_t val)
13760 {
13761 uint64_t result = 0;
13762
13763 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
13764 if (val != 0xf000)
13765 {
13766 TRACE_SYSCALL (cpu, " HLT [0x%x]", val);
13767 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13768 sim_stopped, SIM_SIGTRAP);
13769 }
13770
13771 /* We have encountered an Angel SVC call. See if we can process it. */
13772 switch (aarch64_get_reg_u32 (cpu, 0, NO_SP))
13773 {
13774 case AngelSVC_Reason_HeapInfo:
13775 {
13776 /* Get the values. */
13777 uint64_t stack_top = aarch64_get_stack_start (cpu);
13778 uint64_t heap_base = aarch64_get_heap_start (cpu);
13779
13780 /* Get the pointer */
13781 uint64_t ptr = aarch64_get_reg_u64 (cpu, 1, SP_OK);
13782 ptr = aarch64_get_mem_u64 (cpu, ptr);
13783
13784 /* Fill in the memory block. */
13785 /* Start addr of heap. */
13786 aarch64_set_mem_u64 (cpu, ptr + 0, heap_base);
13787 /* End addr of heap. */
13788 aarch64_set_mem_u64 (cpu, ptr + 8, stack_top);
13789 /* Lowest stack addr. */
13790 aarch64_set_mem_u64 (cpu, ptr + 16, heap_base);
13791 /* Initial stack addr. */
13792 aarch64_set_mem_u64 (cpu, ptr + 24, stack_top);
13793
13794 TRACE_SYSCALL (cpu, " AngelSVC: Get Heap Info");
13795 }
13796 break;
13797
13798 case AngelSVC_Reason_Open:
13799 {
13800 /* Get the pointer */
13801 /* uint64_t ptr = aarch64_get_reg_u64 (cpu, 1, SP_OK);. */
13802 /* FIXME: For now we just assume that we will only be asked
13803 to open the standard file descriptors. */
13804 static int fd = 0;
13805 result = fd ++;
13806
13807 TRACE_SYSCALL (cpu, " AngelSVC: Open file %d", fd - 1);
13808 }
13809 break;
13810
13811 case AngelSVC_Reason_Close:
13812 {
13813 uint64_t fh = aarch64_get_reg_u64 (cpu, 1, SP_OK);
13814 TRACE_SYSCALL (cpu, " AngelSVC: Close file %d", (int) fh);
13815 result = 0;
13816 }
13817 break;
13818
13819 case AngelSVC_Reason_Errno:
13820 result = 0;
13821 TRACE_SYSCALL (cpu, " AngelSVC: Get Errno");
13822 break;
13823
13824 case AngelSVC_Reason_Clock:
13825 result =
13826 #ifdef CLOCKS_PER_SEC
13827 (CLOCKS_PER_SEC >= 100)
13828 ? (clock () / (CLOCKS_PER_SEC / 100))
13829 : ((clock () * 100) / CLOCKS_PER_SEC)
13830 #else
13831 /* Presume unix... clock() returns microseconds. */
13832 (clock () / 10000)
13833 #endif
13834 ;
13835 TRACE_SYSCALL (cpu, " AngelSVC: Get Clock");
13836 break;
13837
13838 case AngelSVC_Reason_GetCmdLine:
13839 {
13840 /* Get the pointer */
13841 uint64_t ptr = aarch64_get_reg_u64 (cpu, 1, SP_OK);
13842 ptr = aarch64_get_mem_u64 (cpu, ptr);
13843
13844 /* FIXME: No command line for now. */
13845 aarch64_set_mem_u64 (cpu, ptr, 0);
13846 TRACE_SYSCALL (cpu, " AngelSVC: Get Command Line");
13847 }
13848 break;
13849
13850 case AngelSVC_Reason_IsTTY:
13851 result = 1;
13852 TRACE_SYSCALL (cpu, " AngelSVC: IsTTY ?");
13853 break;
13854
13855 case AngelSVC_Reason_Write:
13856 {
13857 /* Get the pointer */
13858 uint64_t ptr = aarch64_get_reg_u64 (cpu, 1, SP_OK);
13859 /* Get the write control block. */
13860 uint64_t fd = aarch64_get_mem_u64 (cpu, ptr);
13861 uint64_t buf = aarch64_get_mem_u64 (cpu, ptr + 8);
13862 uint64_t len = aarch64_get_mem_u64 (cpu, ptr + 16);
13863
13864 TRACE_SYSCALL (cpu, "write of %" PRIx64 " bytes from %"
13865 PRIx64 " on descriptor %" PRIx64,
13866 len, buf, fd);
13867
13868 if (len > 1280)
13869 {
13870 TRACE_SYSCALL (cpu,
13871 " AngelSVC: Write: Suspiciously long write: %ld",
13872 (long) len);
13873 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13874 sim_stopped, SIM_SIGBUS);
13875 }
13876 else if (fd == 1)
13877 {
13878 printf ("%.*s", (int) len, aarch64_get_mem_ptr (cpu, buf));
13879 }
13880 else if (fd == 2)
13881 {
13882 TRACE (cpu, 0, "\n");
13883 sim_io_eprintf (CPU_STATE (cpu), "%.*s",
13884 (int) len, aarch64_get_mem_ptr (cpu, buf));
13885 TRACE (cpu, 0, "\n");
13886 }
13887 else
13888 {
13889 TRACE_SYSCALL (cpu,
13890 " AngelSVC: Write: Unexpected file handle: %d",
13891 (int) fd);
13892 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13893 sim_stopped, SIM_SIGABRT);
13894 }
13895 }
13896 break;
13897
13898 case AngelSVC_Reason_ReportException:
13899 {
13900 /* Get the pointer */
13901 uint64_t ptr = aarch64_get_reg_u64 (cpu, 1, SP_OK);
13902 /*ptr = aarch64_get_mem_u64 (cpu, ptr);. */
13903 uint64_t type = aarch64_get_mem_u64 (cpu, ptr);
13904 uint64_t state = aarch64_get_mem_u64 (cpu, ptr + 8);
13905
13906 TRACE_SYSCALL (cpu,
13907 "Angel Exception: type 0x%" PRIx64 " state %" PRIx64,
13908 type, state);
13909
13910 if (type == 0x20026)
13911 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13912 sim_exited, state);
13913 else
13914 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13915 sim_stopped, SIM_SIGINT);
13916 }
13917 break;
13918
13919 case AngelSVC_Reason_Read:
13920 case AngelSVC_Reason_FLen:
13921 case AngelSVC_Reason_Seek:
13922 case AngelSVC_Reason_Remove:
13923 case AngelSVC_Reason_Time:
13924 case AngelSVC_Reason_System:
13925 case AngelSVC_Reason_Rename:
13926 case AngelSVC_Reason_Elapsed:
13927 default:
13928 TRACE_SYSCALL (cpu, " HLT [Unknown angel %x]",
13929 aarch64_get_reg_u32 (cpu, 0, NO_SP));
13930 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13931 sim_stopped, SIM_SIGTRAP);
13932 }
13933
13934 aarch64_set_reg_u64 (cpu, 0, NO_SP, result);
13935 }
13936
13937 static void
13938 dexExcpnGen (sim_cpu *cpu)
13939 {
13940 /* instr[31:24] = 11010100
13941 instr[23,21] = opc : 000 ==> GEN EXCPN, 001 ==> BRK
13942 010 ==> HLT, 101 ==> DBG GEN EXCPN
13943 instr[20,5] = imm16
13944 instr[4,2] = opc2 000 ==> OK, ow ==> UNALLOC
13945 instr[1,0] = LL : discriminates opc */
13946
13947 uint32_t opc = INSTR (23, 21);
13948 uint32_t imm16 = INSTR (20, 5);
13949 uint32_t opc2 = INSTR (4, 2);
13950 uint32_t LL;
13951
13952 NYI_assert (31, 24, 0xd4);
13953
13954 if (opc2 != 0)
13955 HALT_UNALLOC;
13956
13957 LL = INSTR (1, 0);
13958
13959 /* We only implement HLT and BRK for now. */
13960 if (opc == 1 && LL == 0)
13961 {
13962 TRACE_EVENTS (cpu, " BRK [0x%x]", imm16);
13963 sim_engine_halt (CPU_STATE (cpu), cpu, NULL, aarch64_get_PC (cpu),
13964 sim_exited, aarch64_get_reg_s32 (cpu, R0, SP_OK));
13965 }
13966
13967 if (opc == 2 && LL == 0)
13968 handle_halt (cpu, imm16);
13969
13970 else if (opc == 0 || opc == 5)
13971 HALT_NYI;
13972
13973 else
13974 HALT_UNALLOC;
13975 }
13976
13977 /* Stub for accessing system registers. */
13978
13979 static uint64_t
13980 system_get (sim_cpu *cpu, unsigned op0, unsigned op1, unsigned crn,
13981 unsigned crm, unsigned op2)
13982 {
13983 if (crn == 0 && op1 == 3 && crm == 0 && op2 == 7)
13984 /* DCZID_EL0 - the Data Cache Zero ID register.
13985 We do not support DC ZVA at the moment, so
13986 we return a value with the disable bit set.
13987 We implement support for the DCZID register since
13988 it is used by the C library's memset function. */
13989 return ((uint64_t) 1) << 4;
13990
13991 if (crn == 0 && op1 == 3 && crm == 0 && op2 == 1)
13992 /* Cache Type Register. */
13993 return 0x80008000UL;
13994
13995 if (crn == 13 && op1 == 3 && crm == 0 && op2 == 2)
13996 /* TPIDR_EL0 - thread pointer id. */
13997 return aarch64_get_thread_id (cpu);
13998
13999 if (op1 == 3 && crm == 4 && op2 == 0)
14000 return aarch64_get_FPCR (cpu);
14001
14002 if (op1 == 3 && crm == 4 && op2 == 1)
14003 return aarch64_get_FPSR (cpu);
14004
14005 else if (op1 == 3 && crm == 2 && op2 == 0)
14006 return aarch64_get_CPSR (cpu);
14007
14008 HALT_NYI;
14009 }
14010
14011 static void
14012 system_set (sim_cpu *cpu, unsigned op0, unsigned op1, unsigned crn,
14013 unsigned crm, unsigned op2, uint64_t val)
14014 {
14015 if (op1 == 3 && crm == 4 && op2 == 0)
14016 aarch64_set_FPCR (cpu, val);
14017
14018 else if (op1 == 3 && crm == 4 && op2 == 1)
14019 aarch64_set_FPSR (cpu, val);
14020
14021 else if (op1 == 3 && crm == 2 && op2 == 0)
14022 aarch64_set_CPSR (cpu, val);
14023
14024 else
14025 HALT_NYI;
14026 }
14027
14028 static void
14029 do_mrs (sim_cpu *cpu)
14030 {
14031 /* instr[31:20] = 1101 0101 0001 1
14032 instr[19] = op0
14033 instr[18,16] = op1
14034 instr[15,12] = CRn
14035 instr[11,8] = CRm
14036 instr[7,5] = op2
14037 instr[4,0] = Rt */
14038 unsigned sys_op0 = INSTR (19, 19) + 2;
14039 unsigned sys_op1 = INSTR (18, 16);
14040 unsigned sys_crn = INSTR (15, 12);
14041 unsigned sys_crm = INSTR (11, 8);
14042 unsigned sys_op2 = INSTR (7, 5);
14043 unsigned rt = INSTR (4, 0);
14044
14045 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
14046 aarch64_set_reg_u64 (cpu, rt, NO_SP,
14047 system_get (cpu, sys_op0, sys_op1, sys_crn, sys_crm, sys_op2));
14048 }
14049
14050 static void
14051 do_MSR_immediate (sim_cpu *cpu)
14052 {
14053 /* instr[31:19] = 1101 0101 0000 0
14054 instr[18,16] = op1
14055 instr[15,12] = 0100
14056 instr[11,8] = CRm
14057 instr[7,5] = op2
14058 instr[4,0] = 1 1111 */
14059
14060 unsigned op1 = INSTR (18, 16);
14061 /*unsigned crm = INSTR (11, 8);*/
14062 unsigned op2 = INSTR (7, 5);
14063
14064 NYI_assert (31, 19, 0x1AA0);
14065 NYI_assert (15, 12, 0x4);
14066 NYI_assert (4, 0, 0x1F);
14067
14068 if (op1 == 0)
14069 {
14070 if (op2 == 5)
14071 HALT_NYI; /* set SPSel. */
14072 else
14073 HALT_UNALLOC;
14074 }
14075 else if (op1 == 3)
14076 {
14077 if (op2 == 6)
14078 HALT_NYI; /* set DAIFset. */
14079 else if (op2 == 7)
14080 HALT_NYI; /* set DAIFclr. */
14081 else
14082 HALT_UNALLOC;
14083 }
14084 else
14085 HALT_UNALLOC;
14086 }
14087
14088 static void
14089 do_MSR_reg (sim_cpu *cpu)
14090 {
14091 /* instr[31:20] = 1101 0101 0001
14092 instr[19] = op0
14093 instr[18,16] = op1
14094 instr[15,12] = CRn
14095 instr[11,8] = CRm
14096 instr[7,5] = op2
14097 instr[4,0] = Rt */
14098
14099 unsigned sys_op0 = INSTR (19, 19) + 2;
14100 unsigned sys_op1 = INSTR (18, 16);
14101 unsigned sys_crn = INSTR (15, 12);
14102 unsigned sys_crm = INSTR (11, 8);
14103 unsigned sys_op2 = INSTR (7, 5);
14104 unsigned rt = INSTR (4, 0);
14105
14106 NYI_assert (31, 20, 0xD51);
14107
14108 TRACE_DECODE (cpu, "emulated at line %d", __LINE__);
14109 system_set (cpu, sys_op0, sys_op1, sys_crn, sys_crm, sys_op2,
14110 aarch64_get_reg_u64 (cpu, rt, NO_SP));
14111 }
14112
14113 static void
14114 do_SYS (sim_cpu *cpu)
14115 {
14116 /* instr[31,19] = 1101 0101 0000 1
14117 instr[18,16] = op1
14118 instr[15,12] = CRn
14119 instr[11,8] = CRm
14120 instr[7,5] = op2
14121 instr[4,0] = Rt */
14122 NYI_assert (31, 19, 0x1AA1);
14123
14124 /* FIXME: For now we just silently accept system ops. */
14125 }
14126
14127 static void
14128 dexSystem (sim_cpu *cpu)
14129 {
14130 /* instr[31:22] = 1101 01010 0
14131 instr[21] = L
14132 instr[20,19] = op0
14133 instr[18,16] = op1
14134 instr[15,12] = CRn
14135 instr[11,8] = CRm
14136 instr[7,5] = op2
14137 instr[4,0] = uimm5 */
14138
14139 /* We are interested in HINT, DSB, DMB and ISB
14140
14141 Hint #0 encodes NOOP (this is the only hint we care about)
14142 L == 0, op0 == 0, op1 = 011, CRn = 0010, Rt = 11111,
14143 CRm op2 != 0000 000 OR CRm op2 == 0000 000 || CRm op > 0000 101
14144
14145 DSB, DMB, ISB are data store barrier, data memory barrier and
14146 instruction store barrier, respectively, where
14147
14148 L == 0, op0 == 0, op1 = 011, CRn = 0011, Rt = 11111,
14149 op2 : DSB ==> 100, DMB ==> 101, ISB ==> 110
14150 CRm<3:2> ==> domain, CRm<1:0> ==> types,
14151 domain : 00 ==> OuterShareable, 01 ==> Nonshareable,
14152 10 ==> InerShareable, 11 ==> FullSystem
14153 types : 01 ==> Reads, 10 ==> Writes,
14154 11 ==> All, 00 ==> All (domain == FullSystem). */
14155
14156 unsigned rt = INSTR (4, 0);
14157
14158 NYI_assert (31, 22, 0x354);
14159
14160 switch (INSTR (21, 12))
14161 {
14162 case 0x032:
14163 if (rt == 0x1F)
14164 {
14165 /* NOP has CRm != 0000 OR. */
14166 /* (CRm == 0000 AND (op2 == 000 OR op2 > 101)). */
14167 uint32_t crm = INSTR (11, 8);
14168 uint32_t op2 = INSTR (7, 5);
14169
14170 if (crm != 0 || (op2 == 0 || op2 > 5))
14171 {
14172 /* Actually call nop method so we can reimplement it later. */
14173 nop (cpu);
14174 return;
14175 }
14176 }
14177 HALT_NYI;
14178
14179 case 0x033:
14180 {
14181 uint32_t op2 = INSTR (7, 5);
14182
14183 switch (op2)
14184 {
14185 case 2: HALT_NYI;
14186 case 4: dsb (cpu); return;
14187 case 5: dmb (cpu); return;
14188 case 6: isb (cpu); return;
14189 default: HALT_UNALLOC;
14190 }
14191 }
14192
14193 case 0x3B0:
14194 case 0x3B4:
14195 case 0x3BD:
14196 do_mrs (cpu);
14197 return;
14198
14199 case 0x0B7:
14200 do_SYS (cpu); /* DC is an alias of SYS. */
14201 return;
14202
14203 default:
14204 if (INSTR (21, 20) == 0x1)
14205 do_MSR_reg (cpu);
14206 else if (INSTR (21, 19) == 0 && INSTR (15, 12) == 0x4)
14207 do_MSR_immediate (cpu);
14208 else
14209 HALT_NYI;
14210 return;
14211 }
14212 }
14213
14214 static void
14215 dexBr (sim_cpu *cpu)
14216 {
14217 /* uint32_t group = dispatchGroup (aarch64_get_instr (cpu));
14218 assert group == GROUP_BREXSYS_1010 || group == GROUP_BREXSYS_1011
14219 bits [31,29] of a BrExSys are the secondary dispatch vector. */
14220 uint32_t group2 = dispatchBrExSys (aarch64_get_instr (cpu));
14221
14222 switch (group2)
14223 {
14224 case BR_IMM_000:
14225 return dexBranchImmediate (cpu);
14226
14227 case BR_IMMCMP_001:
14228 /* Compare has bit 25 clear while test has it set. */
14229 if (!INSTR (25, 25))
14230 dexCompareBranchImmediate (cpu);
14231 else
14232 dexTestBranchImmediate (cpu);
14233 return;
14234
14235 case BR_IMMCOND_010:
14236 /* This is a conditional branch if bit 25 is clear otherwise
14237 unallocated. */
14238 if (!INSTR (25, 25))
14239 dexCondBranchImmediate (cpu);
14240 else
14241 HALT_UNALLOC;
14242 return;
14243
14244 case BR_UNALLOC_011:
14245 HALT_UNALLOC;
14246
14247 case BR_IMM_100:
14248 dexBranchImmediate (cpu);
14249 return;
14250
14251 case BR_IMMCMP_101:
14252 /* Compare has bit 25 clear while test has it set. */
14253 if (!INSTR (25, 25))
14254 dexCompareBranchImmediate (cpu);
14255 else
14256 dexTestBranchImmediate (cpu);
14257 return;
14258
14259 case BR_REG_110:
14260 /* Unconditional branch reg has bit 25 set. */
14261 if (INSTR (25, 25))
14262 dexBranchRegister (cpu);
14263
14264 /* This includes both Excpn Gen, System and unalloc operations.
14265 We need to decode the Excpn Gen operation BRK so we can plant
14266 debugger entry points.
14267 Excpn Gen operations have instr [24] = 0.
14268 we need to decode at least one of the System operations NOP
14269 which is an alias for HINT #0.
14270 System operations have instr [24,22] = 100. */
14271 else if (INSTR (24, 24) == 0)
14272 dexExcpnGen (cpu);
14273
14274 else if (INSTR (24, 22) == 4)
14275 dexSystem (cpu);
14276
14277 else
14278 HALT_UNALLOC;
14279
14280 return;
14281
14282 case BR_UNALLOC_111:
14283 HALT_UNALLOC;
14284
14285 default:
14286 /* Should never reach here. */
14287 HALT_NYI;
14288 }
14289 }
14290
14291 static void
14292 aarch64_decode_and_execute (sim_cpu *cpu, uint64_t pc)
14293 {
14294 /* We need to check if gdb wants an in here. */
14295 /* checkBreak (cpu);. */
14296
14297 uint64_t group = dispatchGroup (aarch64_get_instr (cpu));
14298
14299 switch (group)
14300 {
14301 case GROUP_PSEUDO_0000: dexPseudo (cpu); break;
14302 case GROUP_LDST_0100: dexLdSt (cpu); break;
14303 case GROUP_DPREG_0101: dexDPReg (cpu); break;
14304 case GROUP_LDST_0110: dexLdSt (cpu); break;
14305 case GROUP_ADVSIMD_0111: dexAdvSIMD0 (cpu); break;
14306 case GROUP_DPIMM_1000: dexDPImm (cpu); break;
14307 case GROUP_DPIMM_1001: dexDPImm (cpu); break;
14308 case GROUP_BREXSYS_1010: dexBr (cpu); break;
14309 case GROUP_BREXSYS_1011: dexBr (cpu); break;
14310 case GROUP_LDST_1100: dexLdSt (cpu); break;
14311 case GROUP_DPREG_1101: dexDPReg (cpu); break;
14312 case GROUP_LDST_1110: dexLdSt (cpu); break;
14313 case GROUP_ADVSIMD_1111: dexAdvSIMD1 (cpu); break;
14314
14315 case GROUP_UNALLOC_0001:
14316 case GROUP_UNALLOC_0010:
14317 case GROUP_UNALLOC_0011:
14318 HALT_UNALLOC;
14319
14320 default:
14321 /* Should never reach here. */
14322 HALT_NYI;
14323 }
14324 }
14325
14326 static bfd_boolean
14327 aarch64_step (sim_cpu *cpu)
14328 {
14329 uint64_t pc = aarch64_get_PC (cpu);
14330
14331 if (pc == TOP_LEVEL_RETURN_PC)
14332 return FALSE;
14333
14334 aarch64_set_next_PC (cpu, pc + 4);
14335
14336 /* Code is always little-endian. */
14337 sim_core_read_buffer (CPU_STATE (cpu), cpu, read_map,
14338 & aarch64_get_instr (cpu), pc, 4);
14339 aarch64_get_instr (cpu) = endian_le2h_4 (aarch64_get_instr (cpu));
14340
14341 TRACE_INSN (cpu, " pc = %" PRIx64 " instr = %08x", pc,
14342 aarch64_get_instr (cpu));
14343 TRACE_DISASM (cpu, pc);
14344
14345 aarch64_decode_and_execute (cpu, pc);
14346
14347 return TRUE;
14348 }
14349
14350 void
14351 aarch64_run (SIM_DESC sd)
14352 {
14353 sim_cpu *cpu = STATE_CPU (sd, 0);
14354
14355 while (aarch64_step (cpu))
14356 {
14357 aarch64_update_PC (cpu);
14358
14359 if (sim_events_tick (sd))
14360 sim_events_process (sd);
14361 }
14362
14363 sim_engine_halt (sd, cpu, NULL, aarch64_get_PC (cpu),
14364 sim_exited, aarch64_get_reg_s32 (cpu, R0, NO_SP));
14365 }
14366
14367 void
14368 aarch64_init (sim_cpu *cpu, uint64_t pc)
14369 {
14370 uint64_t sp = aarch64_get_stack_start (cpu);
14371
14372 /* Install SP, FP and PC and set LR to -20
14373 so we can detect a top-level return. */
14374 aarch64_set_reg_u64 (cpu, SP, SP_OK, sp);
14375 aarch64_set_reg_u64 (cpu, FP, SP_OK, sp);
14376 aarch64_set_reg_u64 (cpu, LR, SP_OK, TOP_LEVEL_RETURN_PC);
14377 aarch64_set_next_PC (cpu, pc);
14378 aarch64_update_PC (cpu);
14379 aarch64_init_LIT_table ();
14380 }
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